2018年成人高考数学真题(理工类)WORD版

2018年成人高考数学真题(理工类)WORD版
2018年成人高考数学真题(理工类)WORD版

2018年成人高等学校招生全国统一考试(高起点)

数学试题(理工农医类)

第Ⅰ卷(选择题,共85分)

一、选择题(本大题共17小题,每小题5分,共85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.设集合={2,4,8},{2,4,6,8},A B =则A B ?=

A . {2,4,6,8}

B .{2,4}

C .{2,4,8}

D .{6}

2.不等式220x x -<的解集为

A . {}02x x x <>或

B . {}-20x x <<

C . {}02x x <<

D .{}-20x x x <>或 3.曲线21y x

=-的对称中心是 A .

1,0-() B . 0,1() C . 2,0() D .1,0() 4.下列函数中,在区间

0,+∞()为增函数的是 A . 1y x -= B .2y x = C . sin y x = D .3x y -=

5.函数()tan(2)3

f x x π=+的最小正周期是 A . 2

π B .2π C . π D .4π 6.下列函数中,为偶函数的是

A .y =

B .2x y -=

C .11y x -=-

D .31y x -=+

7.函数2log (2)y x =+的图像向上平移1个单位后,所得图像对应的函数为

A .2log (1)y x =+

B .2log (3)y x =+

C .2log (2)1y x =+-

D .2log (2)+1y x =+ 8.在等差数列{}n a 中,11a =,公差2360,,,d a a a ≠成等比数列,则d =

A .1

B .1-

C .2-

D .2

9.从1,2,3,4,5中任取2个不同的数,这2个数都是偶数的概率为

A .310

B .15

C .110

D .35

10.圆222660x y x y ++--=的半径为

A B .4 C D .16

11.双曲线223412x y -=的焦距为

A .

B .

C . 4

D .2

12.已知抛物线26y x =的焦点为F ,点(0,1)A -,则直线AF 的斜率为

A .32

B .32-

C .23-

D .23

13.若1名女生和3名男生排成一排,则该女生不在两端的不同排法共有( )种

A .24

B .12

C .16

D .8

14.已知平面向量(1,),(1,2)a t b ==-,若+m a b 平行于向量(2,1)-,则 A .2310t m -+= B .2+310

t m += C .2310t m --=

D .2+310t m -=

15.函数()2cos(3)3f x x π=-在区间,33ππ??-????

的最大值是

A .0

B

C .2

D .-1 16.函数223y x x =-+的图像与直线1y x =+交于,A B 两点,则AB =

A .

B .45.1

C

D .17.设甲:()y f x =的图像有对称轴;乙:()y f x =是偶函数,则

A .甲是乙的充分条件但不是必要条件

B .甲既不是乙的充分条件也不是乙的必要条件

C .甲是乙的充要条件

D .甲是乙的必要条件但不是充分条件

第Ⅱ卷(非选择题,共65分)

二、填空题(本大题共4小题,每小题4分,共16分)

(18)过点()1,2-且与直线310x y +-=垂直的直线方程为 .

(19)掷一枚硬币时,正面向上的概率为

12,掷这枚硬币4次,则恰有2次正面向上的概率是 .

(20)已知3sin 5

x =-,且x 为第四象限角,则sin 2x = .

(21)曲线21x

y x e =-+在点()0,0处的切线方程为 . 三、解答题(本大题共4小题,共49分。)

(22)(本小题满分12分)已知数列{}n a 的前n 项和2(41)3n n S =

-. (1)求{}n a 的通项公式.;

(2)若128k a =,求k .

(23)(本小题满分12分)在ABC 中,30,2,A AB BC ?===

.求

(1)sin C ;

(2)AC .

(24)(本小题满分12分)已知函数()3251f x x x x =+--,求 (1)函数)(x f 的单调区间;

(2)函数)(x f 零点的个数.

(25)(本小题满分12分)已知椭圆C 的长轴长为4,两焦点分别为12(F F .

(1)求C 的标准方程;

(2)若P 为C 上一点,122PF PF -=,求12cos F

PF ∠.

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