湖南省浏阳一中2013-2014学年高一上学期期中考试试卷数学含答案
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湖南省浏阳一中2013-2014学年下学期高二年级期中考试数学试卷(理科)时量:120分钟 分值:150分一、选择题:本大题共8小题,每小题5分,共40分.在每小题给出的四个选项中,只有一项是符合题目要求的.1.在复平面上,复数(2i)i z =-+的对应点所在象限是 A .第一象限B .第二象限C .第三象限D .第四象限2.双曲线22221(0,0)x y a b a b-=>>的渐近线方程是20x y ±=,则其离心率为( )A B .2C D .53.下列有关命题的说法正确的是 A .命题“,11a b a b >->-若则”的否命题...是“,11a b a b >-≤-若则”. B .“1x =-?”是一个命题.C .命题“R x ∈∃0使得01020<++x x ”的否定是:“x R ∀∈, 均有210x x ++<”.D .命题“若12=x ,则1±=x ”的逆否命题为真命题.4.已知ξ~B (n ,p ),且E (ξ)=7,D (ξ)=6,则p 等于A.71 B.61 C.51D.41 5.7个人站一队,其中甲在排头,乙不在排尾,则不同的排列方法有( ).A .720B .600C .576D .3246.某公司生产一种产品, 固定成本为20 000元,每生产一单位的产品,成本增加100元,若总收入R 与年产量x 的关系是R (x )=⎩⎪⎨⎪⎧-x 3900+400x ,0≤x ≤390,90 090,x >390,则当总利润最大时,每年生产产品的单位数是 ( ).A .150B .200C .250D .3007.曲线311y x =+在点P (1,12)处的切线与y 轴交点的纵坐标是( ) A. -9 B. -3 C. 9 D.15 8.设X 是一个离散型随机变量,其分布列为:则q 等于( ) A .1 B .1±22 C .1-22D .1+22二、填空题:本大题共7小题,每小题5分,共35分.把答案填在答题卡相应位置. 9. 设x 6=a 0+a 1(x -1)+a 2(x -1)2+a 3(x -1)3+a 4(x -1)4+a 5(x -1)5+a 6(x -1)6,则a 3=________.10.第二十届世界石油大会将于2011年12月4日~8日在卡塔尔首都多哈举行,能源问题已经成为全球关注的焦点.某工厂经过技术改造后,降低了能源消耗,经统计该厂某种产品的产量x (单位:吨)与相应的生产能耗y (单位:吨)有如下几组样本数据:根据相关性检验,求得回归直线的斜率为0.7.已知该产品的年产量为10吨,则该工厂每年大约消耗的汽油为______吨. 11. 如图所示,在四边形ABCD 中,EF//BC ,FG//AD ,则EF FG+=BC AD.12.在某项测量中,测量结果X 服从正态分布N (1,σ2)(σ>0).若X 在(0,1)内取值的概率为0.4,则X 在(0,2)内取值的概率为________.13. 动点P 到点(2,0)F 的距离与它到直线20x +=的距离相等,则P 的轨迹方程为 ;14. 盒子中有大小相同的3只白球,1只黑球,若从中随机地摸出两只球,两只球颜色不同的概率是_ __ ;15.给出下面的数表序列:其中表n (n =1,2,3)有n 行,表中每一个数“两脚”的两数都是此数的2倍,记表n中所有的数之和为n a ,例如25a =,317a =,449a =.则n a = .三、解答题:本大题共6小题,满分75分.解答须写出文字说明、证明过程和演算步骤. 16. (本小题满分12分)某同学参加科普知识竞赛,需回答三个问题,竞赛规则规定:每题回答正确得100分,回答不正确得-100分.假设这名同学每题回答正确的概率均为0.8,且各题回答正确与否相互之间没有影响.高 考 资 源 网(1)求这名同学回答这三个问题的总得分ξ的概率分布和数学期望. (2)求这名同学总得分不为负分(即ξ≥0)的概率. 17.(本小题满分12分)已知(12+2x )n,(1)若展开式中第5项,第6项与第7项的二项式系数成等差数列,求展开式中二项式系数最大项的系数;(2)若展开式前三项的二项式系数和等于79,求展开式中系数最大的项.18.(12分)如图,在四棱锥P ABCD -中,底面为直角梯形,AD ∥BC ,90BAD ∠=︒,PA ⊥底面ABCD ,且2PA AD AB BC ===,M 、N 分别为PC 、PB 的中点.(Ⅰ) 求证:PB DM ⊥;(Ⅱ) 求BD 与平面ADMN 所成的角。
湖南省浏阳一中2013-2014学年高一下学期期中考试数学试卷(带解析)1.tan(-600°)的值是()A【答案】C【解析】故选C.考点:诱导公式2)A、第一象限B、第二象限C、第三象限D、第四象限.【答案】B【解析】可知是第二象限,故选B.考点:三角函数的定义3.若三点P(1,1),A(2,-4),B(x,-14)共线,则()A、x=-1B、x=3C、x=4D、x=51【答案】C【解析】三点共线,可知两向量共线,根据共线的充故选C.考点:向量共线的坐标表示4.不等式成立的x的取值范围为( )AC【答案】D【解析】故选D.考点:解三角不等式5 )A 【答案】A【解析】A. 考点:1.向量的数量积公式;2.两向量垂直的充要条件.6 )A.,10πϕω==B.ω【答案】C【解析】所以C.考点:三角函数的性质7( )【解析】根据正切函数的图像故选B.考点:复合函数的值域8.如图,BC 、DE 是半径为1的圆O)【答案】B【解析】.故选B.考点:平面向量数量积的定义9下列等式中恒成立的个数有 个。
α)=cos α【答案】1 【解析】试题分析:对;错,考点:诱导公式 10= . 【答案】【解析】原式考点:同角基本关系式 11y=cosx 的图象向平移 个单位,然后把所得的图象上所有点的横坐标 为原来的倍(纵坐标不变)而得到。
【解析】考点:三角函数的图像变换12【解析】所以表达式为:考点:1向量的坐标表示;2.向量的加减公式.13.在△ABC 中,已知tanA=1,tanB=2,则tanC= . 【答案】3 【解析】考点:两角和的正切公式14.函数y= -8cosx 的单调递减区间为.【解析】写成区间形式,考点:三角函数的单调区间15.,的夹角为 . 【解析】 试题分析:,所以s考点:1.向量的数量积公式;2.夹角公式.16P. (1(2.【答案】(1)(2 【解析】试题分析:(1)因为是单位圆,所以,根据三角函数的定义可得(2)根据诱导公式进行化简,代入上一问的结果,即可求值. 解:(1P.6分 (2分原式分考点:1.三角函数的定义;2.诱导公式.17.O 为坐标原点)。
2013-2014学年度上学期期中考试高一数学试卷时间:120分钟 分值:150分一、选择题(每题5分,共50分)1. 集合{}{}2,,(,)2,,A y y x x R B x y y x x R ==∈==+∈⋂则A B=( )A .{(-1,2),(2,4) } B. {( -1 , 1)} C. {( 2, 4)} D. φ2. 某学生从家里去学校上学,骑自行车一段时间,因自行车爆胎,后来推车步行,下图中横轴表示出发后的时间,纵轴表示该生离学校的距离,则较符合该学生走法的图是( )3. 定义集合运算A ◇B =|,,c c a b a A b B =+∈∈,设0,1,2A =,3,4,5B =,则集合A ◇B 的子集个数为( )A .32B .31C .30D .144. 已知函数1232(2)()log (1)(2)x e x f x x x -⎧<⎪=⎨-≥⎪⎩ ,则))2((f f 的值为 A. 2 B. 1 C. 0 D.35. 已知0.312a ⎛⎫= ⎪⎝⎭,20.3b -=,12log 2c =,则,,a b c 的大小关系是( )A .a b c >>B .a c b >>C .c b a >>D .b a c >> 6. 已知21)21(x x f =-,那么12f ⎛⎫⎪⎝⎭= A .4 B .41 C .16 D .1617. 已知函数()=f x 的定义域是一切实数,则m 的取值范围是 ( )A.0<m ≤4B.0≤m ≤1C.m ≥4D.0≤m ≤48. 函数212()log (32)f x x x =-+的递增区间是A . (,1)-∞B . (2,)+∞C . 3(,)2-∞ D .3(,)2+∞ 9. 已知函数()f x 是定义在R 上的偶函数,在(),0-∞上单调递减,且有()3=0f ,则使得()0<f x 的x 的范围为( )A.(),3-∞B. ()3,+∞C.()(),33,-∞+∞D.()3,3-10.对实数a 和b 定义运算“⊗”:,1,,1a ab a b b a b -≤⎧⊗=⎨->⎩. 设函数22()(2)()f x x x x =-⊗-,x ∈R ,若函数()y f x c =-的图像与x 轴恰有两个公共点,则实数c 的取值范围是( )A .3(,2](1,)2-∞--B .3(,2](1,)4-∞---C .11(1,)(,)44-+∞D .31(1,)[,)44--+∞二、填空题(每题5分,共25分) 11.函数)12(log 741)(2++-=x x x f 的定义域为 .12.幂函数()22211m m y m m x--=--在()0,x ∈+∞时为减函数,则m= .13. 已知2510m n==,则11m n+= . 14. 如果函数()f x 满足:对任意实数,a b 都有()()()f a b f a f b +=,且()11f =,则()()()()()()()()()()2342011201212320102011f f f f f f f f f f +++++= _________.15. 给出下列命题:①()f x 既是奇函数,又是偶函数;②()f x x =和2()x f x x=为同一函数;③已知()f x 为定义在R 上的奇函数,且()f x 在(0,)+∞上单调递增,则()f x 在(,)-∞+∞上为增函数;④函数y =[0,4) 其中正确命题的序号是 .三、解答题(共75分)16.(本小题满分12分)⑴计算:0.25-2-25.0log 10log 2)161(85575.032----⑵已知函数)(x f 是定义域为R 的奇函数,当x ≤0时,)(x f =x(1+x).求函数)(x f 的解析式并画出函数)(x f 的图象.17.(本小题满分12分)已知集合{}|5239A x x =-≤+≤,{}|131B x m x m =+≤≤- (1)求集合A ;(2)若B A ⊆,求实数m 的取值范围.18.(本小题满分12分)某商品在近30天内每件的销售价格p (元)与时间t (天)的函数关20,025,,100,2530,.t t t N p t t t N +<<∈⎧=⎨-+≤≤∈⎩该商品的日销售量Q (件)与时间t (天)的函数关系是40+-=t Q ),300(N t t ∈≤<,求这种商品的日销售金额的最大值,并指出日销售金额最大的一天是30天中的第几天?19.(本小题满分12分)定义运算:a bad bc c d=- (1)若已知1k =,求解关于x 的不等式101x x k< -(2)若已知1()1x f x k x=- -,求函数()f x 在[1,1]-上的最大值。
浏阳一中2012年上期高一段考试题数 学时量:120分钟 分值:100分一、选择题(本大题共10小题,每小题3分,共30分)1.-3000的弧度数是( ).A .6π- B .3π-C .65π-D .35π-2. )4,3(-P 为α终边上一点,则=αcos ( ).A .53B .54-C .43-D .34- 3.=⋅-+18tan 12tan 118tan 12tan ( ). A .1 B .3 C .33 D .234. 化简=--+( ).A .B .C .D . 5.向量(,2),(2,2)a k b ==-且//a b ,则k 的值为( ). A .2B .2C .-2D .-26.为了得到函数R x x y ∈+=),32cos(π的图象,只需把函数x y 2cos =的图象( ).A .向左平行移动3π个单位长度B .向左平行移动6π个单位长度 C .向右平行移动3π个单位长度 D .向右平行移动6π个单位长度7.已知3tan =α,则αααα22cos 9cos sin 4sin 2-+的值为( ). A .3B .1021 C .31 D .301 8.若平面四边形ABCD 满足0)(,=⋅-=+,则该四边形一定是( ). A .直角梯形 B .矩形 C .菱形 D .正方形 9.对于等式sin3x=sin2x+sinx,下列说法中正确的是( ).A .对于任意x ∈R,等式都成立B .对于任意x ∈R,等式都不成立C .存在无穷多个x ∈R,使等式成立D .等式只对有限个x ∈R 成立 10.定义运算⎥⎦⎤⎢⎣⎡++=⎥⎦⎤⎢⎣⎡⋅⎥⎦⎤⎢⎣⎡df ce bf ae f e d c b a ,如⎥⎦⎤⎢⎣⎡=⎥⎦⎤⎢⎣⎡⋅⎥⎦⎤⎢⎣⎡1514543021.已知πβα=+,2πβα=-,则=⎥⎦⎤⎢⎣⎡⋅⎥⎦⎤⎢⎣⎡ββααααsin cos sin cos cos sin ( ). A. 00⎡⎤⎢⎥⎣⎦B. 01⎡⎤⎢⎥⎣⎦C. 10⎡⎤⎢⎥⎣⎦D. 11⎡⎤⎢⎥⎣⎦二、填空题(每小题4分,共20分) 11.已知4sin 5α=,并且α是第二象限的角,那么tan α的值等于 . 12.已知,5= 15=⋅,则向量在向量方向上的投影的值为 _ .13.非零向量,,则+==的夹角为 .14 函数)(2cos 21cos )(R x x x x f ∈-=的最大值等于 15.已知f (n )=sin4n π,n ∈Z ,则f (1)+f (2)+f (3)+……+f (2012)=_____________. 三、解答题(本大题共6个小题,共50分)16.(本小题8分)已知函数y=Asin(ωx+φ) (A>0,ω>0,|φ|<π)的 一段图象(如图)所示. (1)求函数的解析式; (2)求这个函数的单调增区间。
普宁一中2013~2014学年度第一学期期中考试高一级数学科试题注意事项:1.本试卷分试题卷和答题卷两部分,考试结束后交答题卷,总分150分,考试时间120分钟。
2.答题前,考生须将自己的姓名、班级、座位号填写在答题卡指定的位置上。
3.选择题的每小题选出答案后,用2B 铅笔将答题卡上对应题目的答案标号涂黑,如需改动,用橡皮擦干净后,再选涂其答案,不能答在试题卷上。
4.非选择题必须按照题号顺序在答题卡上各题目的答题区域内用黑色字迹的钢笔或签字笔作答,超出答题区域或在其它题的答题区域内书写的答案无效。
第Ⅰ卷 选择题部分(满分50分)一、单项选择题(本大题共10小题,每小题5分,共50分。
)1. 已知全集{12345}U =,,,,,集合{1,3}A =,{1,3,4}B =,则集合()U C A B =( * )A .{3}B .{4,5}C .{245},,D .{3,4,5} 2. 若全集{}{}1,2,3,41U U C A ==且,则集合A 的真子集共有( * )A. 3个B. 5个C. 7个D. 8个 3. 函数()lg(23)f x x =-的定义域是( * )A. 3[,)2+∞B. 3(,)2+∞C. 3(,]2-∞D. 3(,)2-∞4. 下列函数中,既是奇函数又是增函数的为( * )A .1y x =+B .2y x =-C .1y x=D .||y x x = 5. 三个数20.40.40.42log 2,,的大小关系为( * )A. 20.40.40.42log 2<<B. 20.40.4log 20.42<< C .20.40.40.4log 22<< D .0.420.4log 220.4<< 6. 函数1()34x f x -=-的零点所在区间为( * )A .(0, 1)B .(1,2)C .(2,3)D .(3,4)D CB A7. 定义在R 上的偶函数在[0,6]上是增函数,在[6,+∞]上是减函数,又(6)5f =, 则()f x ( * )A .在[-6,0]上是增函数,且最大值是5B .在[-6,0]上是增函数,且最小值是5C .在[-6,0]上是减函数,且最小值是5D .在[-6,0]上是减函数,且最大值是5 8. 已知幂函数()f x3),则(2)f 的值是( * )A . 4B .2C .41D .219.某同学家门前有一笔直公路直通长城,星期天,他骑自行车匀速前往旅游,他先前进了a km ,觉得有点累,就休息了一段时间,想想路途遥远,有些泄气,就沿原路返回骑了b km(b <a ), 当他记起诗句“不到长城非好汉”,便调转车头继续前进. 则该同学离起点的距离s 与时间t 的函数关系的图象大致为( * )10. 已知y =f (x )是定义在R 上的奇函数,当0x >时,()3f x x =-,那么不等式0)(<x f 的解集是( * ) A. {}03x x <<B. {}3x x <-C. {}30,03x x x -<<<<或D. {}3,03x x x <-<<或第Ⅱ卷 非选择题部分(满分100分)二、填空题(本大题共4小题,每小题5分,共20分。
2013-2014学年度第一学期期中考试高一年级数学(满分160分,考试时间120分钟)一、 填空题1、设集合}3,1{=A ,集合}5,4,2,1{=B ,则集合=B A2、若1)(+=x x f ,则(3)f =3、函数3)1()(+-=x k x f 在R 上是增函数,则k 的取值范围是4、指数函数x a y =的图像经过点(2,16)则a 的值是5、幂函数2-=x y 在区间]2,21[上的最大值是6、已知31=+aa ,则 =+aa 17、函数321)(-=x x f 的定义域是________.8、化简式子82log 9log 3的值为9、已知函数()y f x =是定义在R 上的单调减函数,且(1)(2)f a f a +>,则a 的取值范围是10、下列各个对应中, 从A 到B 构成映射的是 (填序号)A B A B A B A B(1) (2) (3) (4)11、满足82>x 的实数x 的取值范围12、设()x f 为定义在()+∞∞-,上的偶函数,且()x f 在[)+∞,0上为增函数,则()2-f ,()π-f ,()3f 的大小顺序是____________13、当0>a 且1≠a 时,函数3)(-=x a x f 的图像必过定点14、已知⎩⎨⎧≥+<-=)0(1)0(2)(2x x x x x x f 若,3)(=x f 则=x二、解答题15、全集R U =,若集合},103|{<≤=x x A }72|{≤<=x x B ,则(结果用区间表示)(1)求)()(,,B C A C B A B A U U ;(2)若集合C A a x x C ⊆>=},|{,求a 的取值范围16、对于二次函数2483y x x =-+-,(1)求函数在区间]2,2[-上的最大值和最小值;(2)指出函数的单调区间17、化简或求值:(1))3()4)(3(656131212132b a b a b a -÷-;(2)()281lg500lg lg 6450lg 2lg552+-++18、已知某皮鞋厂一天的生产成本c(元)与生产数量n(双)之间的函数关系是n=c504000+(1)求一天生产1000双皮鞋的成本;(2)如果某天的生产成本是48000元,那么这一天生产了多少双皮鞋?(3)若每双皮鞋的售价为90元,且生产的皮鞋全部售出,试写出这一天的利润P关于这一天生产数量n的函数关系式,并求出每天至少生产多少双皮鞋,才能不亏本?19、已知21()log 1xf x x+=- (1)求()f x 的定义域;(2)求证:()f x 为奇函数(3)判断()f x 的单调性,并求使()0f x >的x 的取值范围。
湖南浏阳一中高三上学期第一次抽考数学试卷(带解析)2021年高考数学的复习重在把握知识点,以下是浏阳一中高三上学期第一次月考数学试卷,请大伙儿认真练习。
一、选择题(本大题共12小题,每小题5分,计60分,每小题有四个选项,其中只有一项是符合题意的,请把你认为正确的答案填在答题纸的相应位置)1.复数等于( C )A. B. C. D.2. 2.函数的零点所在区间是( A )A. B. C. D.3.两座灯塔A和B与海洋观看站C的距离都等于a km,灯塔A在观看站C的北偏东20,灯塔B在观看站C的南偏东40,则灯塔A与灯塔B 的距离为( D )A.a kmB.a kmC.2a kmD.a km4.己知函数(x)=,则(5)的值为B. C.1 D.5.已知m是2,8的等比中项,则圆锥曲线x2+=1的离心率为A.或B.C. D.或是两条不同的直线,是三个不同的平面,给出下列命题:①若; ②若;③若; ④若,则其中正确命题的个数为( B )A.1B.2C.3D.47.某程序框图如图所示,若输出的S = 57,则判定框内应为( B )A.k5?B.k4?C.k7?D.k6?与的模分别为6和5,夹角为120,则B. C. D.9.从10名高三年级优秀学生中选择3人担任校长助理,则甲、乙至少有1人入选,而丙没有入选的不同选法的种数为( C )A.85B.56C.49D.2810.下列说法正确的是( B )A.命题,的否定是,.B.命题已知,若,则或是真命题.C.在上恒成立在上恒成立.D.命题若,则函数只有一个零点的逆命题为真命题.11.由的图象向左平移个单位,再把所得图象上所有点的横坐标伸长到原先的2倍得到的图象,则为( B )A. B. C. D.12.已知差不多上定义在上的函数,,,且,且,.若数列的前项和大于,则的最小值为( A )A.6B.7C.8D.9【解析】∵,,∵,,即,,数列为等比数列,,,即,因此的最小值为6。
2013-2014 学年度第一学期期中考试高一年级数学(满分 160 分,考试时间 120 分钟)一、 填空题1 、设集合 A {1,3} ,集合 B {1,2,4,5} ,则集合 AB2 、若 f ( x) x 1 ,则 f (3)3 、函数 f (x) (k 1)x 3 在 R 上是增函数,则 k 的取值范围是4 、指数函数 y a x 的图像经过点( 2 ,16 )则 a 的值是5 、幂函数 yx 2在区间 [ 1,2] 上的最大值是26 、已知1 3 ,则1aaaa1 7 、函数 f (x)2 x 3的定义域是 ________.8 、化简式子 log 8 9的值为log 2 39 、已知函数 y f ( x) 是定义在 R 上的单调减函数,且 f (a 1)f (2 a) ,则 a 的取值范围是10、下列各个对应中, 从 A 到 B 构成映射的是(填序号)A B ABAB A B1 4 1 1 3 1 a 22 54 2 b 3536253c( 1 )( 2 )(3 )( 4 )11 、满足 2 x 8 的实数 x 的取值范围12 、设 f x 为定义在 ,上的偶函数,且 f x 在 0, 上为增函数,则 f2 , f, f 3 的大小顺序是 ____________13 、当 a 0 且 a 1 时,函数 f ( x) a x3 的图像必过定点x 2 2x ( x 0) 3, 则 x14 、已知 f (x)1(x若 f ( x) x0)二、解答题15 、全集 UR ,若集合 A { x | 3 x 10}, B { x | 2 x 7} ,则(结果用区间表示)(1)求 AB, A B,(C U A)(C U B);(2 )若集合C{ x | x a},A C ,求a的取值范围16 、对于二次函数y4x28x 3 ,(1 )求函数在区间[ 2,2]上的最大值和最小值;(2 )指出函数的单调区间17、化简或求值:211115(1 )(3a3b2)( 4a2b3)( 3a 6 b 6 ) ;(2 )lg500lg 81 lg 64 50 lg2 lg5 2 5 218 、已知某皮鞋厂一天的生产成本c(元)与生产数量 n (双)之间的函数关系是 c 400050 n(1 )求一天生产 1000 双皮鞋的成本;(2)如果某天的生产成本是 48000 元,那么这一天生产了多少双皮鞋?(3)若每双皮鞋的售价为 90 元,且生产的皮鞋全部售出,试写出这一天的利润 P 关于这一天生产数量 n 的函数关系式,并求出每天至少生产多少双皮鞋,才能不亏本?1x19 、已知f (x) log21x(1 )求f (x)的定义域;(2 )求证:f ( x)为奇函数(3 )判断f ( x)的单调性,并求使 f (x)0 的x的取值范围。
浏阳一中2013年下学期高一期中考试试题英语时量:120分钟满分:150分命题人:熊银华审题人:鲁仕新Part I Listening Comprehension (30 marks)Section A (22.5 marks)Directions: In this section, you will hear six conversations between two speakers. For each conversation, there are several questions and each question is followed by three choices marked A, B and C. Listen carefully and then choose the best answer for each question.You will hear each conversation TWICE.Example:When will the magazine probably arrive?A. Wednesday.B. Thursday.C. Friday. The answer is B. Conversation 11.What is the boy doing ?A. Reviewing his lessons in school.. B. Studying at home.C. Taking the final exam.2. What will the woman do when she gets home?A. Help the boy do his homework.B. Give the boy a present.C. Check the boy’s homework.Conversation 23. What is the woman’s reason for not going out with the man?A. She needs to wash her hair.B. She isn’t feeling well.C. She needs to have her hair cut.4. What do we know about the man?A. He’ll see a movie with the woman tomorrow night.B. He washes his hair every night.C. He hasn’t won the woman’s heart yet.Conversation35. How long does the man ask the woman to wait?A. At least one weekB. At most one weekC. At least one month6. What will the woman do next?A. Go to another shop.B. Wait for the man’s call.C. Try on another pair of boots.Conversation47. Why doesn’t Michael have good f riends in his class?A. They have different interests.B. His classmates don’t have much spare time.C. It’s difficult to get along with his classmates.8. What does Michael like?A. Music.B. Sports.C. Reading.9. How did he get to know the boys from the other classes?A. His neighbors are in those classes.B. They attend the same club.C. He has the same teachers with them.Conversation 510. Where is the gas station?A. To the left.B. Next to the bank.C. Across from the post-office.11. How will the man pay for the gas?A. By credit card.B. By cash.C. By check.12. What does the woman suggest the man buy?A. Some postcards.B. Some souvenirs(纪念品)C. A map. Conversation 613. What are the speakers going to do tonight?A. See a movie.B. Have a meeting.C. Attend a party.14. What kind of food does the woman prefer?A. Chinese food.B. Mexican food.C. American food.15. What do we know about Tina?A. She lives in the city.B. She is a humorous and nice girl.C. She and the woman went to the same school.Section B (7.5 marks)Directions: In this section, you will hear a short passage. Listen carefully and then fill in the numbered blanks with the information you have heard. Fill in each blank with NO MORE THAN THREE WORDS.You will hear the short passage TWICE.Weather in EnglandⅠ. A forever topic●People often talk about the weather because they can experience16 seasons in the same day.Ⅱ. Summer or winter●You may see the British go swimming in 17 and wear 18 in summer.Ⅲ. Just in case●They always take an umbrella or 19 with them even when it is 20 . Part II Language Knowledge (45 marks)Section A (15 marks)Directions: Beneath each of the following sentences there are four choices marked A, B, C and D. Choose the one answer that best completes the sentence.21. ---- When shall we begin our meeting tomorrow?---- You ______ come. We’ve changed our plan.A. can’tB. shouldn’tC. needn’tD. mustn’t22. Do you think ______ a struggle to learn English well in high school?A. thatB. thisC. itD. which23. He is much better now, but he hasn’t completely ______ his operation(手术).A. devoted toB. recovered fromC. used toD. suffered from24. Amy regretted ______ the weight-loss pills which caused her liver ______.A. taking; to failB. taking; failingC. to take; failingD. to take; to fail25. Amy was sent to a hospital, ______ she received good treatment.A. with whichB. by whichC. for whichD. in which26. Sh e’s never been to Guangzhou by high-speed railway to visit her daughter,______?A. has sheB. doesn’t sheC. did sheD. hasn’t she27. We teenagers must go through some growing pains, ______ we can’t begrown-up.A. andB. orC. soD. but28. Wei Hua’s teachers in the UK gave her much encouragement in study,______made her very happy.A. whichB. thatC. thisD. who29. Johnna along with two other students ________ by the headmaster at theassembly last Monday.A. were praisedB. praisedC. has been praisedD. was praised30. Daniel, ______ parents left him in charge at home, spent the money for dog foodin getting the sick dog treated.A. whoseB. whichC. in whichD. where31. He told you that they had already finished the project by last Friday, ______.A. didn’t heB. did heC. hadn’t theyD. had they32. ---- Tony achieved high grades in the last examination.---- ______.A. So John didB. So does JohnC. So did JohnD. So John does33. Mr. Zhang has two daughters, ______ are famous doctors in the People’sHospital.A. both of whichB. both of whomC. both of themD. all of whom.34. ______ you have got such a good chance, you might as well make the best of it.A. AlthoughB. Now thatC. As soon asD. As if35. —Have you heard that the rich businessman donated much money to our school?—Yes. With the money, a new gym ______ now.A. is builtB. has been builtC. is being builtD. has builtSection B (18 marks)Directions: For each blank in the following passage there are four words or phrases marked A, B, C and D. Fill in each blank with the word or phrase that best fits the context.One Sunday morning, I decided to buy a computer and went to the biggest shopin town. There were so many computers there that I didn’t know how to 36.a right one.“Hi! What can I do for you?” A young man welcomed me with a sweet smile. He didn’t look like a(n) 37.________ to me but a student like me. He patiently 38.________ me each model. With his help, I bought a computer with enough functions(功能) at a 39.________ price. I enjoyed this shopping experience because of his smile.A few months 40.________, something was wrong with my computer. I went back to the 41.________ to have it fixed. When I arrived there, what I saw first was 42.________ his smile. As soon as I told him my 43.________, he tried his best to solve it for me. I was quite thankful for his sweet smile and 44.________ service.When I went back to school, I often 45.________ his sweet smile. I don’t know whether we will meet again, 46. ________ his smile will stay in my memory and deep in my heart.Smiling is the most peaceful and beautiful language in the daily life. If everyone 47. ________ others as the young man did, our world will be a more comfortable and36. A. choose B. find C. enjoy D. look37. A. worker B. salesman C. expert D. boss38. A. served B. brought C. sent D. showed39. A. high B. cheap C. low D. small40. A. ago B. later C. before D. after41. A. man B. town C. store D. repairman42. A. still B. even C. also D. too43. A. thought B. problem C. reason D. question44. A. quick B. sweet C. good D. slow45. A. think over B. think out C. think about D. think of46. A. and B. so C. but D. or47. A. changes B. makes C. gives D. helpsSection C (12 marks)Directions: Complete the following passage by filling in each blank with one word that best fits the context.Dear Linda,I’m very glad that you want to learn Chinese. I know that 48.______ isn’t easy to learn a foreign language, but I have some ideas 49.______may help.First, it’s very important to listen to the teacher carefully 50.______ class and take notes so that you can go over your lessons later. 51.______, try to practice speaking Chinese 52.______ much as possible both in and out of class. Don’t be afraid of making mistakes. Finally, you should plan your time well 53.______ do a lot of exercises.I think 54.______ most important thing is that you should believe in yourself. I’m sure you will succeed after 55.______ hard work.Best wishes and looking forward to meeting you in China.Yours,Li HuaPart III Reading Comprehension (30 marks)Directions: Read the following three passages. Each passage is followed by several questions or unfinished statements. For each of them there are four choices marked A, B,C and D. Choose the one that fits best according to the information given in the passage.AKeeping pets was a popular online game among teenagers three years ago. Here is a report on it in a newspaper written at that time.“More than 30 students in our class have kept pets online.”said Zhao Min, a student from Changsha, who also keeps pets online.Liu Yue from Beijing keeps pets on . This girl says it is great fun. She thinks that she has also learned how to take care of others. If one doesn’t feed and care for the pet, it becomes unhappy and unhealthy. So keeping an online pet means spending a lot of time online. This makes many parents worried.Song Xin from Shanghai has been keeping a penguin(企鹅) on since last year. He says his parents know about the penguin and think it is okay.If students can keep the balance between studying and playing, it’s not bad for them to keep pets online.56. How many examples are mentioned in the passage?A. Two.B. Three.C. Four.D. Five.57. What does Liu Yue think of keeping pets online?A. It’s not interesting at all.B. It wastes time.C. It’s not good for her study.D. It is great fun.58. What is Song Xin’s parents’ attitude(态度) toward his keeping pets online?A. They don’t allow her to do so.B. They let her do so.C. They ask her to do so.D. They don’t want her to do so.59. Which of the following is NOT true according to the passage?A. Keeping an online pet doesn’t mean spending a lot of time online.B. If one doesn’t feed the pet, it becomes unhappy and unhealthy.C. Keeping pets online makes many parents worried.D. The writer thinks students should keep the balance between studying and playing.60. What does the passage mainly talk about?A. How to keep pets online.B. It’s good to keep pets online.C. Keeping pets online is popular among teenagers.D. Keeping pets online is bad for children’s studies.BWelcome to the Story County Family. It is a community service center that helps parents and other people in our community. There are different kinds of services. The following is a list of them. If you need any of the services, please call us. OurA. fiveB. sevenC. nineD. ten62. What is the name of the community service center?A. Story County FamilyB. Community Family ServiceC. Entertainment CenterD. Health Center63. If you want to look for information on where to spend your holidays with yourclassmates at the weekend, which kind of service had you better choose?A. EntertainmentB. Children with special needs.C. Summer Activities.D. Out-of-school Activities.64. Which of the following services are only for children?(1). Children with special needs. (2). Education.(3). Out-of-school Activities. (4). Summer Activities.(5). Before and After School ChildcareA. (1)(2)(3)(4)(5)B. (1)(2)(3)(4)C. (1)(2)(3)(5)D. (3)(4)(5)65. This is probably a ______.A. message(留言)B. guidebook(指南)C. poster(海报)D. note(记录、笔记)CDick was having dinner with his family one evening. Suddenly his younger sister asked, “Why does it look like that outside?” Everyone looked out of the window. They saw a dark sky with big grey clouds. Next, they heard the tornado siren(龙卷风警报). That meant a tornado was coming. They all knew that during a tornado the safest place to be is the basement(地下室). They all ran quickly into the basement. Suddenly, Dick remembered Pete, the pet cat. “Mom, I will go upstairs and find Pete!” Dick yelled. But his mother said, “No, Dick! It’s too dangerous. You have to stay here.” All at once they heard the very loud noise of a very strong wind. It was so loud that they could not even hear their own screams.Just a few seconds later, the tornado went away and everyone was safe. Dick ran upstairs and found Pete was gone. He began to cry and went outside. He saw that all the trees were blown down except one. And at the top of the tree, there was Pete, looking at Dick and waiting for him.66. Why did Dick and his family go to the basement?A. Because it was going to rain.B. Because they heard the noise of a very strong wind.C. Because everyone was very scared.D. Because the safest place is the basement when a tornado happens.67. Why didn’t Dick’s mother let him go upstairs to look for Pete?A. Because it was too dangerous.B. Because she couldn’t hear him.C. Because Dick was too young.D. Because the house was badly damaged.68. What was the loud noise Dick and his family heard when they were in the basement?A. Screaming.B. The wind.C. The siren.D. The trees.69. Why did Dick begin to cry?A. Because the tornado went away.B. Because Pete was badly hurt.C. Because Pete was gone.D. Because Pete was at the top of the tree.70. From the passage we know ________.A. The weather was normal that day.B. The pet cat was clever.C. Dick hadn’t taken good care of the cat.D. Dick’s mother didn’t like the pet cat.Part IV Writing (45 marks)Section A (10 marks)Directions: Read the following passage. Fill in the numbered blanks by using the information from the passage.Write NO MORE THAN THREE WORDS for each answer.People in the United States honor their parents with two special days: Mothers’Day, on the second Sunday in May, and Fathers’Day, on the third Sunday in June. These days are set aside(设立) to show love and respect for parents. They raise their children and educate (教育)them to be responsible citizens(有责任感的公民). They give love and care. These two days offer a chance to think about the changing roles of mothers and fathers. More mothers now work outside the home. More fathers must help with child-care.These two special days are celebrated (庆祝)in many different ways. On Mothers’ Day people wear carnations(康乃馨). A red one stands for a living mother.A white one shows that the mother is dead. Many people attend religious services (宗教仪式)to honor parents. It is also a day when people whose parents are dead visit their graves(墓地). On these days, families get together at home and inrestaurants. They often have outdoor BBQs for Fathers’ Day. These are days of fun and good feelings and memories.Another tradition is to give cards and gifts. Children make them in school. Many people make their own presents. These are valued(珍视) more than the ones bought in stores. It is not the value of the gift that is important, but it is “the thought that counts”. Greeting card stores, florists, candy makers, bakeries, telephones companies and other stores do a lot of business during these holidays.Section B (10 marks)Directions: Read the following passage, Answer the questions according to the information given in the passage.Beth was a beautiful girl. She met Tara in dance class and soon they became close friends. Beth felt comfortable talking to Tara about her thoughts and feelings. And Tara always seemed to be a good listener.One day after school, Beth heard some other girls talking about something that only she and Tara knew. She felt very angry. Later Beth found out that Tara was talking behind her back(背后说坏话), so she had a fight with Tara.Why did Tara do this? Tara’s problem came from her envy(嫉妒). She envied Beth’s nice clothes and expensive things. She also hated the fact that Beth often treated her like a psychologist(心理学家) rather than a friend.How should they avoid(避免) this fight? Perhaps Beth should realize Tara’s need for friendship. She shouldn’t use Tara as a person to complain(发牢骚) to. As for Tara, if she was honest about her envy, the friends might be able to talk things out(把事说出来). In this way, they wouldn’t hurt each other’s feelings.81. Where did Beth meet Tara? (no more than 4 words)_____________________________________________________________________ ___82. Why did Beth have a fight with Tara? (no more than 12 words)_____________________________________________________________________ ___83. What might happen if Tara was honest about her envy? (no more than 10 words) _____________________________________________________________________ ___84. What is the best title of this article? (no more than 10 words)_____________________________________________________________________ ___Section C (25 marks)Directions: Write an English composition according to the instructions given below in Chinese.假如你叫李华,Tony是你朋友,他体型超重,经常为此感到羞愧,很少与同学交流。
2014年下学期浏阳一中期中考试高一数学试题 时量:120分钟 分值:150分 命题: 审题:一、选择题:(本大题共10小题,每小题5分,共50分.在每小题给出的四个选项中,只有一项是符合题目要求的.)1. 已知集合A={-1,0,1},B={x ︱-1≤x <1},则A ∩B= ( ) (A ){0} (B ){0,-1} (C ){0,1} (D ){0,1,-1}2.函数y=1212+-x x 是( )(A )奇函数 (B )偶函数 (C )非奇非偶函数 (D )既是奇函数又是偶函数3.下列关系中正确的是( ) (A )7log 6<1ln 2 < 3log π(B )3log π<1ln 2<7log 6 (C )1ln2<7log 6 < 3log π (D )1ln 2< 3log π<7log 6 4.设lg 2a =,lg3b =,则5log 12=( ) (A )21a b a ++ (B )21a b a ++ (C )21a ba+- (D )21a ba+- 5.下列哪组中的两个函数是同一函数 ( )A f(x)=x-1,2()1x g x x=- B 24(),()()f x x g x x == C 326(),()f x x g x x ==D 0()1,()f x g x x ==6.函数()f x =212log (32)x x -+的递减区间为( )A 、3(,)2-∞B 、 (1,2)C 、3(,)2+∞ D 、(2,)+∞ 7.下列函数中,不能用二分法求零点的是 ( )A 31y x =+B 21y x =- C 2log (1)y x =- D 2(1)y x =- 8.若函数2(22)my m m x =+-为幂函数且在第一象限为增函数,则m 的值为( )A 1B -3C -1D 39.设函数332,0,()1log ,0.2x x f x x x -⎧-≤⎪=⎨〉⎪⎩若f(m )>1,则m 的取值范围是( )A (,1)-∞-B (9,)+∞C (,1)(9,)-∞-⋃+∞D (,1)(6,)-∞-⋃+∞ 10.若函数22()(1)()f x x x ax b =-++的图象关于直线x=-2对称,则a,b 的值分别为( ) A 8,15 B 15,8 C 3,4 D -3,-4 二、填空题(本大题共5小题,每小题5分,共25分) 11.已知函数f(x)是奇函数,且当x >0时,f(x)= 21x x+,则f(-1)= 。
浏阳市2013年上学期期终考试试卷高一数学一、选择题(本大题共8小题,每小题5分,共40分)1.某单位共有老、中、青职工430人,其中青年职工160人,中年职工180人.为了解职工身体状况,现采用分层抽样方法进行调查,在抽取的样本中有青年职工32人,则该样本中的老年职工人数为 A.9B .18C .27D .362.设M 是平行边形ABCD 的对角线的交点, O 为任意一点,则OA OB OC OD +++等于 A. OM B. 2OM C. 3OM D. 4OM3.对变量,x y 有观测数据(,)(1,2,i i x y i =…,10),得散点图(1)所示.对变量,u v 有观测数据(,)(1,2i i u v i =,…,10),得散点图(2).由这两个散点图可以判断A. 变量x 与y 正相关, u 与v 正相关 B . 变量x 与y 正相关, u 与v 负相关 C . 变量x 与y 负相关, u 与v 正相关 D . 变量x 与y 负相关, u 与v 负相关4.如图是计算111246+++…+118+120的值的一个程序框图,其中在判断框中应填入的条件是A .i <10B .i >10C .i <20D .i >20 5. 已知43cos,sin ,2525θθ=-=那么角θ的终边所在的象限为 A.第四象限 B.第三象限 C.第二象限 D.第一象限 6.已知12tan ,tan(),25ααβ=-=-那么tan(2)βα-的值为 A.34- B.112- C.98- D.987.已知5,28,3()AB a b BC a b CD a b =+=-+=-,则A . AB D 、、三点共线 B . A BC 、、三点共线 C . B CD 、、三点共线 D . A C D 、、三点共线8.已知ABC ∆的外接圆的圆心为O ,若2AB AC AO +=,且||||2OA AC ==,则向量BA 在向量BC 方向上的投影为.A .B .C 3 .D 1二、填空题(本大题共7小题,每小题5分,共35分)9.已知向量(3,4)a =-,若||1e =,且e 与a 的夹角等于180︒,则e = 10.已知,x y 的取值如下表所示:从散点图分析,y 与x 线性相关,且ˆ0.95yx a =+,以此预测当2x =时,y = . 11.点A 为周长等于4的圆周上的一个定点,若在该圆周上随机取一点B ,则劣弧AB 的长度小于1的概率为 .12.执行如图所示的程序框图,若输入A 的值为2,则输出的P 值是 .13.将参加数学竞赛的1000名学生编号如下:0001,0002,0003,…,1000,打算从中抽取一个容量为50的样本,按系统抽样的方法分成50个部分,如果第一部分编号为0001,0002,0003,…,0020,第一部分随机抽取一个号码为0015,则抽取的第40个号码为 。
湖南省浏阳一中高一上学期期中考试(数学)一、选择题(本大题共10小题,每小题3分,共30分。
在每小题给出的四个选项中,只有一项是符合题目要求的) 1.设{}{}02,022<-==--=x x B x x x A ,则=B A ( )A. {}1-B.{}1 C.{}2,1- D.{}2,1- 2.下列各组函数中,表示同一函数的是 ( )A .33,x y x y ==B .x y x y lg 2,lg 2==C .2)(,||x y x y ==D .0,1x y y ==3.函数()2log (1)f x x =+的定义域为 ( )A .[)1,3-B .()1,3-C .(1,3]-D .[]1,3-4.函数()xf x a =在[0,1]上的最大值与最小值之和为3,则a 的值是( )A .12 B .2 C .3 D .325. 函数 1+=x xy (1-≠x )的反函数是 ( )A.x x y -=1 (1≠x )B. 1-=x xy (1≠x )C. x x y 1-=(0≠x )D. xxy -=1(0≠x )6.方程124xx ⎛⎫=-+ ⎪⎝⎭的解的个数为 ( )A.0B.1C.2D.37.函数y=x-1,在下列哪个区间上是增函数( )A.(-∞,0)B.(-∞,1)C. (1,+∞)D. (0,+∞)8.函数()f x 是定义域为R 的奇函数,当0x >时()1f x x =-+,则当0x <时,()f x 的表达式为( )A .()1f x x =-+B .()1f x x =--C .()1f x x =+D .()1f x x =-9.三个数60.70.70.76log 6,,的大小关系为( ) A 60.70.70.7log 66<< B 60.70.70.76log 6<<C 0.760.7log 660.7<< D 60.70.7log 60.76<<10.容器A 中有m 升水,将水缓慢注入空容器B ,经过t 分钟时容器A 中剩余水量y 满足指数型函数e me y at (-=为自然对数的底数,a 为正常数),若经过5分钟时容器A 和容器B 中的水量相等,经过n 分钟容器A 中的水只有4m,则n 的值为 ( )A .7B .8C .9D .10二、填空题(本大题共5小题,每小题3分,共15分)11.已知集合A={1,2,3},B={2,m ,4},A ∩B={2,3},则m=12.设1:-→ax x f 为从集合A 到B 的映射,若3)2(=f ,则=)3(f _____________. 13.函数y=6x 4x 2+- 当]4,1[x ∈时,函数的值域为___________________ 14.函数y=3222)1(----m mx m m 是幂函数,且在()+∞∈,0x 上是减函数,则实数____=m15.设奇函数)(x f 的定义域为[]5,5-,若当[0,5]x ∈时, )(x f 的图象如右图,则不等式()0f x <的解是三、解答题(本大题共6小题,共55分。
湖南省浏阳市2012-2013学年高一数学上学期中联考试题一、选择题:(本大题8小题,每小题4分,共32分) 1、为了得到函数sin()6y x π=+的图象,可将函数sin y x =的图象( )A .向右平移6π个单位 B .向左平移6π个单位 C .向右平移12π个单位D .向左平移12π个单位2、若tan 3α=,则2sin 2cos αα的值为( )A. 2B. 3C. 4D. 6 3、函数22cos 2sin 2y x x =-的最小正周期是( )A.π2B. π4C.4π D.2π 4、已知向量a =(x ,y), b =( -1,2 ),且a +b =(1,3),则a等于( )A 2B 3C 5D 105、已知向量x x 则实数平行与若向量和,22),1,()2,1(-+==等于 ( )A .21B .1C .31D .26、如果函数3cos(2)y x ϕ=+的图象关于点4(,0)3π中心对称,那么||ϕ的最小值为( )A .6πB .4π C .3π D .2π 7、如图所示,已知,,,,2c b a ====则下列等式中成立的是(A )b a c-=2 (B )a b c-=2 (C )a b c 2123-= (D )b a c 2123-=8、定义在R 上的偶函数)(x f 满足)()2(x f x f =+且)(x f 在]2,3[--上是减函数,又βα,是锐角三角形的两个内角,则( )A 、)(cos )(sin βαf f >B 、)(cos )(sin βαf f <C 、)(sin )(sin βαf f >D 、)(cos )(cos βαf f <二、填空题:本大题7小题,每小题4分,共28分. 9.求值:sin630°= .10、如图所示,在平面直角坐标系xOy ,角α的终边与单位圆交于点A ,已知点A 的纵坐标为45,则cos α= 。
2014-2015学年湖南省长沙市浏阳一中高一(上)期中数学试卷一、选择题:(本大题共10小题,每小题5分,共50分.在每小题给出的四个选项中,只有一项是符合题目要求的.)1.(5分)已知集合A={﹣1,0,1},B={x|﹣1≤x<1},则A∩B=()A.{0} B.{﹣1,0} C.{0,1} D.{﹣1,0,1}2.(5分)函数y=是()A.奇函数B.偶函数C.非奇非偶函数D.既是奇函数又是偶函数3.(5分)下列关系中正确的是()A.l og76<ln<log3πB.l og3π<ln<log76C.l n<log76<log3πD.l n<log3π<log764.(5分)设lg2=a,lg3=b,则log512等于()A.B.C.D.5.(5分)下列四组函数中,f(x)与g(x)表示同一个函数的是()A.f(x)=x﹣1,B.f(x)=x2,C.f(x)=x2,D.f(x)=1,g(x)=x06.(5分)函数f(x)=的递减区间为()A.B.(1,2)C.D.(2,+∞)7.(5分)下列函数中,不能用二分法求零点的是()A.y=3x+1 B.y=x2﹣1 C.y=log2(x﹣1)D.y=(x﹣1)28.(5分)若函数y=(m2+2m﹣2)x m为幂函数且在第一象限为增函数,则m的值为()A.1B.﹣3 C.﹣1 D.39.(5分)设函数f(x)=,若f(m)>1,则m的取值范围是()A.(﹣∞,﹣1)B.(9,+∞)C.(﹣∞,﹣1)∪(9,+∞) D.(﹣∞,﹣1)∪(6,+∞)10.(5分)若函数f(x)=(1﹣x2)(x2+ax+b)的图象关于直线x=﹣2对称,则a,b的值分别为()A.8,15 B.15,8 C.3,4 D.﹣3,﹣4二、填空题(本大题共5小题,每小题5分,共25分)11.(5分)已知函数f(x)为奇函数,且当x>0时,f(x)=x2+,则f(﹣1)=.12.(5分)设集合A={a,b},B={0,1},则从集合A到集合B的不同映射共有个.13.(5分)若函数y=f(x)是函数y=2x的反函数,则f=.14.(5分)若2a=5b=10,则=.15.(5分)定义集合运算A⊕B={z|z=x+y,x∈A,y∈B},若A={1,2,3},B={0,1},则A⊕B的子集个数有个.三.解答题:本大题共6小题,共75分.解答应写出文字说明,证明过程或演算步骤.16.(12分)已知集合P={1,5,10},S={1,3,a2+1},若S∪P={1,3,5,10},求实数a的值.17.(12分)(1)已知x+x﹣1=3,求下列各式,x2+x﹣2的值;(2)求值:(lg2)2+lg2lg50+lg25.18.(12分)已知函数f(x)=2x﹣4,g(x)=﹣x+4.(1)求f(1)、g(1)、f(1)•g(1)的值;(2)求函数y=f(x)•g(x)的解析式,并求此函数的零点;(3)写出函数y=f(x)•g(x)的单调区间.19.(13分)对于函数.(1)探索函数f(x)的单调性;(2)是否存在实数a使得f(x)为奇函数.20.(13分)已知函数f(x)的定义域是{x|x>0},对于定义域内的任意x1,x2都有f(x1•x2)=f(x1)+f(x2),且当x>1时f(x)>0,f(2)=1,(1)判断函数f(x)的单调性,并用定义证明;(2)求不等式f(2x﹣1)<2的解集.21.(13分)设f(x)=lg,其中a∈R,如果当x∈(﹣∞,1)时,f(x)有意义,求a的取值范围.2014-2015学年湖南省长沙市浏阳一中高一(上)期中数学试卷参考答案与试题解析一、选择题:(本大题共10小题,每小题5分,共50分.在每小题给出的四个选项中,只有一项是符合题目要求的.)1.(5分)已知集合A={﹣1,0,1},B={x|﹣1≤x<1},则A∩B=()A.{0} B.{﹣1,0} C.{0,1} D.{﹣1,0,1}考点:交集及其运算.专题:集合.分析:找出A与B的公共元素,即可确定出两集合的交集.解答:解:∵A={﹣1,0,1},B={x|﹣1≤x<1},∴A∩B={﹣1,0}.故选B点评:此题考查了交集及其运算,熟练掌握交集的定义是解本题的关键.2.(5分)函数y=是()A.奇函数B.偶函数C.非奇非偶函数D.既是奇函数又是偶函数考点:函数奇偶性的判断.专题:计算题;函数的性质及应用.分析:先求定义域,再计算f(﹣x),化简与f(x)比较,即可得到奇偶性.解答:解:定义域为R,关于原点对称,f(﹣x)===﹣f(x),则函数为奇函数.故选A.点评:本题考查函数的奇偶性的判断,注意运用定义解决,属于基础题.3.(5分)下列关系中正确的是()A.l og76<ln<log3πB.l og3π<ln<log76C.l n<log76<log3πD.l n<log3π<log76考点:对数值大小的比较.专题:函数的性质及应用.分析:利用对数函数的单调性即可得出.解答:解:∵0,0<log76<1,log3π>1,∴ln<log76<log3π,故选:A.点评:本题考查了对数函数的单调性,属于基础题.4.(5分)设lg2=a,lg3=b,则log512等于()A.B.C.D.考点:对数的运算性质.专题:计算题.分析:先用换底公式把log512转化为,再由对数的运算法则知原式为=,可得答案.解答:解:log512===.故选C.点评:本题考查对数的性质和计算,解题时要注意对数换底公式的灵活运用.5.(5分)下列四组函数中,f(x)与g(x)表示同一个函数的是()A.f(x)=x﹣1,B.f(x)=x2,C.f(x)=x2,D.f(x)=1,g(x)=x0考点:判断两个函数是否为同一函数.分析:分别判断四个答案中f (x)与g (x)的定义域是否相同,并比较化简后的解析式是否一致,即可得到答案.解答:解:A中,f(x)=x﹣1的定义域为R,的定义域为{x|x≠0},故A中f (x)与g (x)表示的不是同一个函数;B中,f(x)=x2的定义域为R,的定义域为{x|x≥0},故B中f (x)与g (x)表示的不是同一个函数;C中,f(x)=x2,=x2,且两个函数的定义域均为R,故C中f (x)与g (x)表示的是同一个函数;D中,f(x)=1,g(x)=x0=1(x≠0),故两个函数的定义域不同,故D中f (x)与g (x)表示的不是同一个函数;故选C点评:本题考查的知识点是判断两个函数是否为同一函数,其中掌握判断两个函数是否为同一函数要求函数的三要素均一致,但实际只须要判断定义域和解析式是否一致即可.6.(5分)函数f(x)=的递减区间为()A.B.(1,2)C.D.(2,+∞)考点:复合函数的单调性.专题:函数的性质及应用.分析:令t=x2﹣3x+2>0,求得函数的定义域,根据f(x)=,本题即求函数t在定义域内的增区间,再利用二次函数的性质求得函数t在定义域内的增区间.解答:解:令t=x2﹣3x+2>0,求得x<1,或x>2,故函数的定义域为{x|x<1,或x>2},且f(x)=,故本题即求函数t在定义域内的增区间.再利用二次函数的性质求得函数t在定义域内的增区间为(2,+∞),故选:D.点评:本题主要考查复合函数的单调性,对数函数、二次函数的性质,体现了转化的数学思想,属于基础题.7.(5分)下列函数中,不能用二分法求零点的是()A.y=3x+1 B.y=x2﹣1 C.y=log2(x﹣1)D.y=(x﹣1)2考点:二分法的定义.专题:试验法;函数的性质及应用.分析:逐一分析各个选项,观察它们是否有零点,函数在零点两侧的符号是否相反.解答:解:f(x)=3x﹣1是单调函数,有唯一零点,且函数值在零点两侧异号,可用二分法求零点;f(x)=x2﹣1也是单调函数,有唯一零点,且函数值在零点两侧异号,可用二分法求零点;f(x)=log2(x﹣1)也是单调函数,有唯一零点,且函数值在零点两侧异号,可用二分法求零点;f(x)=(x﹣1)2虽然也有唯一的零点,但函数值在零点两侧都是正号,故不能用二分法求零点.故选:D.点评:函数能用二分法求零点必须具备2个条件,一是函数有零点,而是函数在零点的两侧符号相反.8.(5分)若函数y=(m2+2m﹣2)x m为幂函数且在第一象限为增函数,则m的值为()A.1B.﹣3 C.﹣1 D.3考点:幂函数的性质.专题:函数的性质及应用.分析:根据题意,列出不等式组,求出m的值即可.解答:解:∵函数y=(m2+2m﹣2)x m为幂函数且在第一象限为增函数,∴;解得m=1,∴m的值为1.故选:A.点评:本题考查了幂函数的性质与应用问题,解题时应熟记幂函数的图象与性质是什么,属于基础题.9.(5分)设函数f(x)=,若f(m)>1,则m的取值范围是()A.(﹣∞,﹣1)B.(9,+∞)C.(﹣∞,﹣1)∪(9,+∞) D.(﹣∞,﹣1)∪(6,+∞)考点:分段函数的应用.专题:计算题;函数的性质及应用.分析:由分段函数可得,或,运用指数函数和对数函数的单调性,即可解得.解答:解:由分段函数可得,或,即有或,则m<﹣1或m>9.故选:C.点评:本题考查分段函数及运用:解不等式,考查指数不等式和对数不等式的解法,考查函数的单调性及运用,属于中档题.10.(5分)若函数f(x)=(1﹣x2)(x2+ax+b)的图象关于直线x=﹣2对称,则a,b的值分别为()A.8,15 B.15,8 C.3,4 D.﹣3,﹣4考点:函数的图象.专题:函数的性质及应用.分析:由题意得f(﹣1)=f(﹣3)=0且f(1)=f(﹣5)=0,由此求出a和b的值.解答:解:∵函数f(x)=(1﹣x2)(x2+ax+b)的图象关于直线x=﹣2对称,∴f(﹣1)=f(﹣3)=0,且f(1)=f(﹣5)=0,即=0,且=0,解得a=8,b=15,故选:A.点评:本题主要考查函数图象的对称性,体现了转化的数学思想,属于基础题.二、填空题(本大题共5小题,每小题5分,共25分)11.(5分)已知函数f(x)为奇函数,且当x>0时,f(x)=x2+,则f(﹣1)=﹣2.考点:函数奇偶性的性质.专题:函数的性质及应用.分析:当x>0时,f(x)=x2+,可得f(1).由于函数f(x)为奇函数,可得f(﹣1)=﹣f(1),即可得出.解答:解:∵当x>0时,f(x)=x2+,∴f(1)=1+1=2.∵函数f(x)为奇函数,∴f(﹣1)=﹣f(1)=﹣2.故答案为:﹣2.点评:本题考查了函数奇偶性,属于基础题.12.(5分)设集合A={a,b},B={0,1},则从集合A到集合B的不同映射共有4个.考点:映射.专题:探究型.分析:根据映射的定义,可知a有两个对应结果,b也有两个对应结果,所以可以得到从集合A到集合B的不同映射个数.解答:解:根据映射的定义可知,对应集合A中的任何一个元素必要在B中,有唯一的元素对应.则a可以和0对应,也可以和1对应.同理b可以和0对应,也可以和1对应.所以a有两个结果,b也有两个结果,所以共有2×2=4种不同的对应.即f:a→0,b→0,f:a→1,b→1,f:a→0,b→1,f:a→1,b→0.故答案为:4.点评:本题主要考查了映射的定义以及应用,要求熟练掌握映射的定义.13.(5分)若函数y=f(x)是函数y=2x的反函数,则f=0.考点:反函数.专题:函数的性质及应用.分析:函数y=f(x)是函数y=2x的反函数,可得f(x)=log2x.再利用对数的性质即可得出.解答:解:∵函数y=f(x)是函数y=2x的反函数,∴f(x)=log2x.∴f=f(log22)=f(1)=log21=0.故答案为:0.点评:本题考查了反函数的求法、对数的性质,属于基础题.14.(5分)若2a=5b=10,则=1.考点:对数的运算性质.专题:计算题.分析:首先分析题目已知2a=5b=10,求的值,故考虑到把a和b用对数的形式表达出来代入,再根据对数的性质以及同底对数和的求法解得,即可得到答案.解答:解:因为2a=5b=10,故a=log210,b=log510=1故答案为1.点评:此题主要考查对数的运算性质的问题,对数函数属于三级考点的内容,一般在高考中以选择填空的形式出现,属于基础性试题同学们需要掌握.15.(5分)定义集合运算A⊕B={z|z=x+y,x∈A,y∈B},若A={1,2,3},B={0,1},则A⊕B的子集个数有16个.考点:子集与真子集.专题:集合.分析:先求出A⊕B,从而求出它的子集的个数.解答:解:由题意得:A⊕B={1,2,3,4},∴A⊕B的子集有42=16个,故答案为:16.点评:本题考查了集合的子集与真子集问题,是一道基础题.三.解答题:本大题共6小题,共75分.解答应写出文字说明,证明过程或演算步骤.16.(12分)已知集合P={1,5,10},S={1,3,a2+1},若S∪P={1,3,5,10},求实数a的值.考点:并集及其运算.专题:集合.分析:由并集运算及已知可得a2﹣1=5,或a2﹣1=10,由此求得a的值.解答:解:∵P={1,5,10},S={1,3,a2+1},由S∪P={1,3,5,10},得:a2﹣1=5,或a2﹣1=10.解得:a=±2或a=±3.点评:本题考查了并集及其运算,是基础的计算题.17.(12分)(1)已知x+x﹣1=3,求下列各式,x2+x﹣2的值;(2)求值:(lg2)2+lg2lg50+lg25.考点:对数的运算性质;有理数指数幂的化简求值.专题:函数的性质及应用.分析:(1)利用=x+x﹣1+2即可得出.利用x2+x﹣2=(x+x﹣1)2﹣2即可得出.(2)利用对数的运算法则、lg2+lg5=1即可得出.解答:解:(1)∵x+x﹣1=3,∴=x+x﹣1+2=3+2=5.∴=.∵x2+x﹣2=(x+x﹣1)2﹣2=32﹣2=7.∴x2+x﹣2=7.(2)(lg2)2+lg2lg50+lg25=lg2(lg2+lg50)+2lg5=2lg2+2lg5=2.点评:本题考查了指数运算法则、乘法公式、对数的运算法则、lg2+lg5=1,属于基础题.18.(12分)已知函数f(x)=2x﹣4,g(x)=﹣x+4.(1)求f(1)、g(1)、f(1)•g(1)的值;(2)求函数y=f(x)•g(x)的解析式,并求此函数的零点;(3)写出函数y=f(x)•g(x)的单调区间.考点:函数单调性的判断与证明;函数解析式的求解及常用方法.专题:计算题.分析:(1)由于f(x)=2x﹣4,g(x)=﹣x+4,代入即可求得f(1)、g(1)、f(1)•g (1)的值;(2)令f(x)•g(x)=0即可求得此函数的零点;(3)将y=f(x)•g(x)=(2x﹣4)(﹣x+4)化为y=﹣2(x﹣3)2+2,即可写出其单调区间.解答:解:∵f(x)=2x﹣4,g(x)=﹣x+4,∴f(1)=﹣2,g(1)=3,f(1)•g(1)=﹣6;(2)∵y=f(x)•g(x)=(2x﹣4)(﹣x+4),∴令(2x﹣4)(﹣x+4)=0,解得x=2或x=4,即此函数的零点是2,4.(3)y=f(x)•g(x)=(2x﹣4)(﹣x+4)=﹣2x2+12x﹣16=﹣2(x﹣3)2+2,∵此函数是二次函数,图象的对称轴是直线x=3,∴此函数的递增区间是(﹣∞,3],递减区间是专题:函数的性质及应用.分析:(1)设x1<x2,化简计算f(x1)﹣f(x2)的解析式到因式乘积的形式,判断符号,得出结论.(2))假设存在实数a使f(x)为奇函数,∴f(﹣x)=﹣f(x),由此等式解出a的值,若a无解,说明不存在实数a使f(x)为奇函数,若a有解,说明存在实数a使f(x)为奇函数.解答:解:(1)∵f(x)的定义域为R,设x1<x2,则f(x1)﹣f(x2)=a﹣﹣(a﹣)=2×,(3分)∵x1<x2,∴,(5分)∴f(x1)﹣f(x2)<0,即f(x1)<f(x2),所以不论a为何实数f(x)总为增函数.(6分)(2)假设存在实数a使f(x)为奇函数,∴f(﹣x)=﹣f(x)(7分)即,(9分)解得:a=1,故存在实数a使f(x)为奇函数.(12分)点评:本题考查函数的奇偶性、单调性的判断和证明,属于基础题.20.(13分)已知函数f(x)的定义域是{x|x>0},对于定义域内的任意x1,x2都有f(x1•x2)=f(x1)+f(x2),且当x>1时f(x)>0,f(2)=1,(1)判断函数f(x)的单调性,并用定义证明;(2)求不等式f(2x﹣1)<2的解集.考点:抽象函数及其应用;函数单调性的性质.专题:函数的性质及应用.分析:(1)先任取两个变量,界定大小,再作差变形看符号.(2)先令x1=x2=2,求得f(4)=2,再根据函数的单调性,得到关于不等式组,解得即可.解答:解:(1)函数f(x)为减函数,证明:设x2>x1>0,则f(x2)﹣f(x1)=f(x1•)﹣f(x1)=f(x1)+f()﹣f(x1)=f().∵x2>x1>0,∴>1.∴f()>0,即f(x2)﹣f(x1)>0.∴f(x2)>f(x1).∴f(x)在(0,+∞)上是增函数.(2)令x1=x2=2,∴f(4)=f(2)+f(2)=1+1=2,∵f(2x﹣1)<2,∴f(2x﹣1)<f(4),∵f(x)在(0,+∞)上是增函数.∴,解得<x<,故原不等式的解集为(,)点评:本题主要考查单调性和奇偶性的判断与证明.以及抽象函数的性质和应用,解题时要注意公式f(xy)=f(x)+f(y)(x,y>0),f(2)=1的灵活运用.21.(13分)设f(x)=lg,其中a∈R,如果当x∈(﹣∞,1)时,f(x)有意义,求a的取值范围.考点:对数函数图象与性质的综合应用.专题:综合题.分析:当a=0时,真数恒大于0,成立;当a≠0时,x<1,0<2x≤21=2,设b=2x,则4x=b2,0<b≤2,>0,即ab2+b+1>0,所以a(b+)2﹣+1>0.由此进行分类讨论,能够求出a的取值范围.解答:解:当a=0时,真数恒大于0,成立;当a≠0时,x<1,0<2x≤21=2设b=2x,则4x=b2,0<b≤2,>0,即ab2+b+1>0,a(b+)2﹣+1>0,当0<b≤2时成立,当﹣≤0,a>0时,则a(b+)2﹣+1开口向上,﹣≤0<b≤2,∴二次函数是增函数,∴f(b)=a(b+)2﹣+1>f(0)=1>0,成立.当0<﹣≤1,a≤﹣时,则a(b+)2﹣+1开口向下,且b=2时有最小值∴f(2)=4a+3>0,a>﹣,∴﹣<a≤﹣.当1<﹣≤2,﹣<a≤﹣时,则a(b+)2﹣+1开口向下,且b=0时有最小值,但b不取0∴f(0)=1>0,成立.﹣<a≤﹣.当﹣>2,﹣时,则a(b+)2﹣+1开口向下,0<b≤2<﹣,∴f(b)是增函数∴f(b)>f(0)=1>0,成立∴﹣<a<0.综上所述:a>﹣.点评:本题考查对数函数的图象和性质的综合运用,综合性强,难度较大.解题时要认真审题,注意换元思想、整体思想和分类讨论思想的灵活运用.易错点是分类不清,考虑不全,造成“会而不对,对而不全”的错误.。
浏阳一中2013年上学期高一段考试题数 学时量:120分钟 满分:150分 制卷人:罗琼英 审题人:贺注国 一、选择题(本大题共个小题,每小题5分,共计40分.在每小题给出的四个选项中,只有一项是符合题目要求的,请把正确答案的代号填在答题卡上.) 1.()sin cos f x x x =最小值是( )A .-1 B. 12- C.12D 。
12.若-错误!<α<0,则点P (tan α,cos α)位于 ( )A .第一象限B .第二象限C .第三象限D .第四象限3.函数y =sin x +cos x 的最小值和最小正周期分别是 ( )A .-错误!,2πB .-2,2πC .-2,πD .-2,π4.已知α为第二象限角,3sin 5α=,则sin 2α=A .2524-B .2512-C .2512D .25245.如图,设A 、B 两点在河的两岸,一测量者在A 的同侧,在所在的河岸边选定一点C ,测出AC 的距离为50 m ,∠ACB =45°,∠CAB =105°后,就可以计算出A 、B 两点的距离为 ( )A .50错误! mB .50错误! mC .25错误! mD .错误! m6.△ABC 中,M 为边BC 上任意一点,N 为AM 中点,AN =λAB +μAC ,则λ+μ的值为 ( )A .12 B .错误! C .错误! D .17..sin 47sin17cos30cos17- ( )A .32-B .12- C .12D .328.在平面直角坐标系中,O 为坐标原点,设向量OA =a ,OB =b ,其中a =(3,1),b =(1,3).若OC =λa +μb ,且0≤λ≤μ≤1,则C 点所有可能的位置区域用阴影表示正确的是 ( )二、填空题:本大题共7小题,每小题5分,共35分. 把答案填在答题卡上的相应横线上.9.已知|a |=1,|b | =2且(a -b )⊥a ,则a 与b 夹角的大小为 .10.已知sin x =2cos x ,则sin 2x +1=________。
湖南省浏阳一中2013-2014学年高一下学期期中考试数学试卷(带解析)湖南省浏阳一中2013-2014学年高一下学期期中考试数学试卷(带解析)1.tan(-600°)的值是()A【答案】C【解析】故选C.考点:诱导公式2)A、第一象限B、第二象限C、第三象限D、第四象限. 【答案】B【解析】可知是第二象限,故选B.考点:三角函数的定义3.若三点P(1,1),A(2,-4),B(x,-14)共线,则()A、x=-1B、x=3C、x=4D、x=51【答案】C【解析】三点共线,可知两向量共线,根据共线的充故选C.考点:向量共线的坐标表示4.不等式成立的x的取值范围为( )AC【答案】D【解析】故选D. 考点:解三角不等式15)A【答案】A【解析】A. 考点:1.向量的数量积公式;2.两向量垂直的充要条件. 6【答案】C 【解析】所以C.考点:三角函数的性质7( )2【答案】B【解析】根据正切函数的图像故选B.考点:复合函数的值域8.如图,BC、DE是半径为1的圆O)【答案】B【解析】.故选B.考点:平面向量数量积的定义9下列等式中恒成立的个数有个。
α)=cosα【答案】1【解析】试题分析:对;错,3故只有B对.考点:诱导公式10【答案】【解析】原式考点:同角基本关系式11y=cosx的图象向平移个单位,然后把所得的图象上所有点的横坐标为原来的倍(纵坐标不变)而得到。
【解析】考点:三角函数的图像变换12【解析】所以表达式为:考点:1向量的坐标表示;2.向量的加减公式.13.在△ABC中,已知tanA=1,tanB=2,则tanC= . 【答案】3【解析】4考点:两角和的正切公式14.函数y= -8cosx的单调递减区间为.【解析】写成区间形式,考点:三角函数的单调区间15.,.【解析】试题分析:,所以s0考点:1.向量的数量积公式;2.夹角公式.16P(1. (2 .【答案】(1)【解析】(2 试题分析:(1)因为是单位圆,所以,根据三角函数的定义可得5(2)根据诱导公式进行化简,代入上一问的结果,即可求值.解:(1P.6分(2分分原式考点:1.三角函数的定义;2.诱导公式.17.O为坐标原点)。
浏阳一中2013年下学期高一期中考试试题数 学时量:120分钟 分值:150分 命题人:易艳 审题人:王华海一、选择题(本大题共8小题,每小题5分,共40分)1、已知集合{1,2,3,4,5,6},{134}U A ==,,,,则U C A =( )(A ){5,6} (B ){1,2,3,4} (C ){2,5,6} (D ){2,3,4,5,6} 2、下列哪组中的两个函数是同一函数( )(A )2y =与y x = (B )3y =与y x =(C )y 2y =(D )y =与2x y x=3、若函数()(()0)f x f x ≠ 为奇函数,则必有( ) (A )()()0f x f x ⋅-> (B )()()0f x f x ⋅-< (C )()()f x f x <- (D )()()f x f x >-(A ) 0.377,0.3,ln 0.3 (B )0.377,ln 0.3,0.3 (C ) 70.30.3,7,ln 0.3 (D )0.37ln 0.3,7,0.35、把函数1y x=的图象向左平移1个单位,再向上平移2个单位后,所得函数的解析 式应为( ) (A )321x y x -=- (B )211x y x -=- (C )211x y x +=-+ (D )231x y x +=+6、函数()212log 45y x x =--的递减区间为( )(A )()-∞,2(B )()2+∞,(C )()--1∞, (D )()5+∞,7、函数2223()(1)m m f x m m x --=-- 是幂函数,且在(0,)x ∈+∞ 是减函数,则实数m =( )(A )2(B )3 (C )1 (D )-18、定义域为R 的函数()f x 满足条件:①[]()12121212()()0,(,,)f x f x x x x x R x x +-->∈≠ ;② ()()0()f x f x x R +-=∈ ; ③(3)0f -= .则不等式()0x f x ⋅< 的解集是( ) (A ){|303}x x x -<<>或 (B ){|33}x x x <-≤<或0 (C ){|-33}x x x <>或 (D ){|303}x x x -<<<<或0二、填空题:(本大题共7小题,每小题5分,共35分)9、函数()f x =的定义域为______. 10、若一次函数()f x x b =+有一个零点2,那么函数2()+g x bx x =的零点是 . 11、当a >0且a ≠1时,函数()2xf x a =+ 必过定点 . 12、已知0<a<1,则方程log x a a x =的解的个数为 个 . 13、方程4-5240x x ⋅+=的解集为 .14、定义集合运算{|,,}{12},{02}A B z z xy x A y B A B *==∈∈==,设,,, 则集合 A B *的所有元素之和为 .15、已知()(2)(3)f x m x m x m =-++,()22xg x =-,若同时满足条件: ①,x R ∈任意的有()0f x <或()0g x < ; ②存在(,4)x ∈-∞- ,使得()()0f x g x < .则()0g x <的解集是 , m 的取值范围是_______.三、解答题:(本大题共6小题,共75分) 16、(满分12分)计算下列各式的值.(1) ()()1223021329.63 1.548--⎛⎫⎛⎫ ⎪ ⎪⎝⎭⎝⎭---+(2)2lg5lg20(lg2)⋅+17、(满分12分)已知{|23},B {|15},A x a x a x x x =≤≤+=<->或 若A B φ⋂= , 求a 的取值范围.18、(满分12分)已知()f x 是定义在(0,+∞)上的增函数,且满足条件以下条件:()()()f xy f x f y =+,(2)1f =.(1)求证:(8)3f =.(2)求不等式()3(2)f x f x >+-的解集.19、(满分13分)已知a 是实数,函数2()223f x ax x a =+--,如果函数()y f x =在区间[-1,1]上有零点,求实数a 的取值范围.20、(满分13分)某公司要将一批不易存放的蔬菜从A 地运到B 地,有汽车、火车两种运若这批蔬菜在运输过程(含装卸时间)中损耗为300元/h ,设A 、B 两地距离为km (1)设采用汽车与火车运输的总费用分别为()f x 与()g x ,求()f x 与()g x . (2)试根据A 、B 两地距离大小比较采用哪种运输工具比较好(即运输总费用最小). (注:总费用=途中费用+装卸费用+损耗费用)21、(满分13分)已知函数2()=lg(2)f x ax x a -+. (1)如果()f x 的定义域为R ,求a 的取值范围. (2)如果()f x 的值域为R ,求a 的取值范围.数学参考答案一、选择题:CBBAD DAD 二、填空题:9、{|24}x x x ≥≠且或 ))(2,44,⋃+∞⎡⎣ 10、0,1211、(0,3) 12、1 13、{0,2} 14、615、{|1}x x < ,(4,2)-- 三、解答题:16、(1)解:原式= 23221)23()827(1)49(--+-- =2323212)23()23(1)23(-⨯-⨯+-- =22)23()23(123--+-- =21………………………6分()()2(2)=lg5lg(102)lg 22lg5(1lg 2)lg 2lg5lg 2(lg5lg 2)lg5lg 21⋅⨯+=⋅++=+⋅+=+=解:原式 ………………………6分 17、解:由,A B φ⋂=① 若,23, 3.A a a a φ=>+∴>有 ………………………4分,2-13523A a a a a φ≠≥⎧⎪∴+≤⎨⎪≤+⎩②若如图:……………………9分1- 2.2a ⇒≤≤ ……………………11分1[-,2](3,).2a ⋃+∞综上所述,的取值范围是 ……………………12分18、(1)证明: 由题意得f (8)=f (4×2)=f (4)+f (2)=f (2×2)+f (2)=f (2)+f (2)+f (2)=3f (2) ………………………2分又∵f (2)=1 ………………………3分 ∴f (8)=3 ………………………4分(2)解:∵f (8)=3 ∴f (x )>f (x -2)+f (8)=f (8x -16) ………………………5分 ∵f (x )是(0,+∞)上的增函数 ………………………6分∴⎩⎨⎧->>-)2(80)2(8x x x ………………………10分解得2<x <167 ………………………11分∴不等式的解集是167{|2}x x << ………………………12分19、解:a=0时,不符合题意,所以a ≠0, ………………………1分 方程f(x)=0在[-1,1]上有解<=>(1)(1)0f f -⋅≤ ………………………4分或(1)0(1)048(3)01[1,1]2af af a a a-≥⎧⎪≥⎪⎪∆=++≥⎨⎪⎪-∈-⎪⎩ ……………………12分 15a ⇔≤≤或a ≤或5a ≥⇔a 或1a ≥ 。
所以实数a的取值范围是a ≤或1a ≥ ………………………13分20、解:由题意可知,用汽车运输的总支出为:()81000(2)300141600(0)50xf x x x x =+++⋅=+> ………………………3分用火车运输的总支出为:()42000(4)30073200(0)100xg x x x x =+++⋅=+> ………………………6分(1)由()()f x g x < 得16007x <; (2)由()=()f x g x 得1600=7x ;(3)由()()f x g x > 得16007x > . ……………………………12分答:当A 、B 两地距离小于16007km 时,采用汽车运输好当A 、B 两地距离等于16007km 时,采用汽车或火车都一样当A 、B 两地距离大于16007km 时,采用火车运输好 ………………13分21、解:(1)由题意知,220ax x a -+>恒成立. ………………1分 显然0a = 不符合题意, ………………2分2440,a a >⎧∴⎨=-<⎩………………5分 1a ⇒∴>∴ 实数a 的范围是{|1}a a > ………………6分(2)由题意知,真数22ax x a -+ 需取遍所有的正数. ………………1分 0a =时,22=-2ax x a x -+符合条件; ………………2分当0a ≠时,则有20440,a a >⎧⎨=-≥⎩ ………………5分 解得:01a <≤ . ………………6分 综上可得:{|01}a a ≤≤ ………………7分。