第十四周周末作业(综合题)

第十四周周末作业(综合题)
第十四周周末作业(综合题)

第十四周周末作业2013.6.15

命题人:云献军

(1)已知集合}02|{2>-=x x x A ,}55|{<<-=x x B ,则

(A )R B A =?(B )Φ=?B A (C )A B ?(D )B A ? (2)若复数z 满足|34|)43(i z i +=-,则z 的虚部为

(A )4- (B )5

4-

(C )4 (D )54

(3)为了解某地区的中小学生的视力情况,拟从该地区的中小学生中抽取部分学生进行调查,事先已了解到该

地区小学、初中、高中三个阶段学生的视力情况有较大差异,而男女生视力情况差异不大。在下面的抽样方法中,最合理的抽样方法是

(A )简单随机抽样(B )按性别分层抽样(C )按学段分层抽样(D )系统抽样 (4)已知双曲线C :

)0,0(12

2

22>>=-b a b

y a x 的离心率为25,则C (A )x y 41±=(B )x y 31±=(C )x y 2

1

±=(D )x y ±=

(5)执行右边的程序框图,如果输入的]3,1[-∈t ,则输出的s 属于

(A) ]4,3[- (B)]2,5[- (C) ]3,4[- (D)]5,2[-

(6)如图,有一个水平放置的透明无盖的正方体容器,容器高8cm.,将一个

球放在容器口,再向容器内注水,当球面恰好接触水面时测得水深为6cm ,如 果不计容器的厚度,则球的体积为 (A)33866cm π(B)33500cm π(C)331372cm π(D) 33

2048cm π

(7)设等差数列}{n a 的前n 项和为n S ,若21-=-m S ,0=m S ,31=+m S ,则m =

(A )3(B )4 (C )5 (D )6

(8)某几何体的三视图如图所示,则该几何体的体积为 (A )16+8π(B )8+8π (C )16+16π(D )8+16π

b a 713=,则m =

(A )5(B )6(C )7 (D )8

(10)已知椭圆E :)0(122

22>>=+b a b

y a x 的右焦点为F (3,0),过点F 的直线交E 于A ,B 两点.若A B 的

中点坐标为(1,-1),则E 的方程为

(A )1364522=+y x (B )127

362

2=+y x (C )1182722=+y x (D )191822=+y x (11)已知函数=)(x f ?

??>+≤+-.0),1ln(,0,22x x x x x 若|)(|x f ≥ax ,则a 的取值范围是

(A) ]1,(-∞ (B)]0,(-∞ (C) ]1,2[- (D)]0,2[-

(12)设△n n n C B A 的三边长分别为n n n c b a ,,,△n n n C B A 的面积为n S ,n =1,2,3,….若

2

,2,,2,11111111n

n n n n n n n a b c a c b a a a c b c b +=+=

==+>+++,则 (A )}{n S 为递增数列(B )}{n S 为递减数列

(C )}{12-n S 为递增数列,}{2n S 为递减数列(D )}{12-n S 为递减数列,}{2n S 为递增数列 (13)已知两个单位向量a ,b 的夹角为60°,c=ta+(1-t) b.若b ·c=0,则t =____________. (14)若数列}{n a 的前n 项和3

1

32+=

n n a S ,则}{n a 的通项公式是n a =__________. (15)设当θ=x 时,函数x x x f cos 2sin )(-=取得最大值,则=θcos _________________. (16)若函数))(1()(22b ax x x x f ++-=的图像关于直线x =-2对称,则)(x f 的最大值为________. (17)已知曲线C 1的参数方程式??

?+=+=,

sin 55,

cos 54t y t x (t 为参数),以坐标原点为极点,x 轴的正半轴为极轴建立坐

标系,曲线C2的极坐标方程式为θρsin 2=. (Ⅰ)把C 1的参数方程化为极坐标方程;

(Ⅱ)求C 1与C2交点的极坐标)

(πθρ20,0<≤≥。

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