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江西省2018年三校生统一招生高考数学真题

江西省2018年三校生统一招生高考数学真题
江西省2018年三校生统一招生高考数学真题

江西省2018年高等职业学校统一高考数学真题

第Ⅰ卷(选择题 共70分)

一、是非选择题:本大题共10小题,每小题3分,共30分.对每小题的命题做出判断,对的选A ,错的选B.

1、已知集合A B B x x A ?=≥-=},5,4,3{},02{ . (A B )

2、若)(x f 是定义在R 上的奇函数,则0)1()1(=+-f f . (A B )

3、过点)1,0(A , )2,0(B 的直线的倾斜角为o

0 . (A B )

4、→

→→=-BA OB OA . (A B ) 5、已知R c b a ∈,,,若b a >,则22bc ac > . (A B )

6、若等差数列}{n a 的通项公式为n a n 21-=,则该数列的公差为2 . (A B )

7、直线02=-y x 与0124=+-y x 互相平行 . (A B )

8、若32=x

,62=y

,则2

1

2

=

-y

x . (A B ) 9、在ABC ?中,角A , B , C 所对的边分别为c b a ,,,若B A sin sin >,则b a > .(A B ) 10、已知抛物线)0(22

>=p px y 的焦点为F ,若P 为该抛物线上一点,则以P 为圆心,PE 为半径的圆与y 轴相切 . (A B )

二、单项选择题:本大题共8小题,每小题5分,共40分。

11、如图,集合}4,3,2,1{=U ,}3,1{=A ,}2,1{=B ,则图中阴影部分所表示的集合是( ).

A. }2,1{

B. }2{

C. }4,2{

D. }4{ 12、不等式01562

<+-x x 的解集为 ( ).

A. )21,31(

B. ),2

1()31,(+∞-∞ C. )3

1

,(-∞ D. ),2

1(+∞ 13、已知数列}{n a 的前n 项和为n S ,若21=-+n n a a ,65=a ,则=7S ( ). A. 28 B. 40 C. 54 D. 66 14、函数1cos 2)(2

-=x x f 的最小正周期为( ). A.

2

π

B. π

C. π2

D. π4

15、已知椭圆的焦点在x 轴上,离心率为2

3

,且椭圆上任意一点到两个焦点的距离之和为

8,则该椭圆的标准方程为( ).

A. 12422=+y x

B. 141222=+y x

C. 141622=+y x

D. 112

1622=+y x

16、若21≤≤x 是m x ≥的充分不必要条件,则实数m 的取值范围是( ). A. ),2(+∞ B. ),2[+∞ C. )1,(-∞ D. ]1,(-∞

17、某厂对200名员工的体重情况进行了统计,

其频率分布直方图如图所示,则体重在)

65,60[(单位:kg )内的人数为( ).

A. 70

B. 80

C. 100

D. 120 18、函数x a y 1

-=与)

10(log ≠>=a a x y a 且在同一坐标系下的图像可以是( )

.

A B C D

第Ⅱ卷(非选择题 共80分)

三、填空题:本大题共6小题,每小题5分,共30分.

19、满足不等式423<-x 的正整数=x .

20、双曲线18

42

2=-y x 的渐近线方程为 . 21、7)2(x

x +的展开式中含3

x 项的系数为 .

22、已知函数??

???≤>=1,21

,2

)(x x x x f x ,则)(x f 的最大值为 .

23、已知一个圆柱的底面半径为1,体积为π2,则该圆柱的侧面积为 . 24、已知单位向量),2

1(x e =,向量),1(xy a =,若a e ⊥,则y 的值为 .

班级:_____________________姓名:_____________________座位号:_________________

***************************密*********************封*********************线****************************

四、解答题:本大题共6小题,25~28小题每小题8分,29~30小题每小题9分,共50分.

解答应写出过程或步骤.

25、已知),0(πα∈,且3

1

)cos(=+απ,求α2sin 的值 .

26、已知}{n a 为等比数列且4,2

1

52==

a a . (Ⅰ)求622212log log log a a a +?++的值 . (Ⅱ)求}{n a 的前n 项和n S .

27、某县响应国家“精准扶贫”政策,从5名干部(其中处级干部2人,科级干部3人)中随机

抽调3人前往某乡开展扶贫工作 .

(Ⅰ)求所抽调的3人中恰有1名初级干部的概率;

(Ⅱ)求所抽调的3人中既有处级干部又有科级干部的概率 .

28、已知函数)2(log )(2

2+-=ax x x f ,且0)1(=f . (Ⅰ)求实数a 的值;

(Ⅱ)求)(x f 在区间]2

3,0[上的值域 .

29、已知圆C 经过)0,1(),0,1(B A -两点,且圆心C 在x 轴的上方,半径为2. (Ⅰ)求圆C 的标准方程;

(Ⅱ)若)2

3,1(M 为圆C 的弦PQ 的中点,求PQ 所在的直线方程 .

30、如图,在正三棱柱111C B A ABC -中,AB BB =1,D 为BC 的中点 . (Ⅰ)证明:D AB C A 11//平面; (Ⅱ)求二面角1B AD B --的正切值 .

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