集合基础训练

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1.已知集合{32,}A x x n n ==+∈N ,{6,8,10,12,14}B =,则A

B 中的元素个数为

(A )5 (B )4

(C )3 (D )2

2.设集合

,,则

(A ){1,3}(B ){3,5}(C ){5,7}(D ){1,7} 3.已知集合A ={}|2x x <,B ={}|320x x ->,则

A .A

B =3|2x x ⎧⎫<⎨⎬⎩

B .A B =∅

C .A

B 3|2x x ⎧

⎫=<⎨⎬⎩

D .A

B=R

4.已知集合{}02A =,,{}21012B =--,,,,,则A B =

A .{}02,

B .{}12,

C .{}0

D .{}21012--,,

,, 5.已知集合{1U =,2,3,4,5,6,7},{2A =,3,4,5},{2B =,3,6,7},则(U

B

A =

)

A .{1,6}

B .{1,7}

C .{6,7}

D .{1,6,7}

6.已知集合{|12}A x x =-<<,{|03}B x x =<<,则A

B = A .(1,3)-

B .(1,0)-

C .(0,2)

D .(2,3)

7.已知集合,则

(A ) (B ) (C ) (D ) 8. 设集合{1,2,3},{2,3,4}A B ==,则A B =

A. {}123,4,,

B. {}123,,

C. {}234,,

D. {}134,,

9.已知集合{}1,3,5,7A =,{}2,3,4,5B =,则A

B =

A .{}3

B .{}5

C .{}3,5

D .{}1,2,3,4,5,7

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

A .(1,)-+∞

B .(,2)-∞

C .(1,2)-

D .∅

(1)设集合{0,2,4,6,8,10},{4,8}A B ==,则A B = (A ){48},

(B ){026},

, (C ){02610},

,, (D ){0246810},

,,,, 11.已知集合A={1,2,3,4},B={2,4,6,8},则A

B 中元素的个数为

A .1

B .2

C .3

D . 4

{1

23}A =,,,2{|9}B x x =

,,,,{21012}--,,,,{123},

,{12},

12.已知集合A={1,2,3,4},B={2,4,6,8},则A B 中元素的个数为

A .1

B .2

C .3

D .4

13.已知集合{|10}A x x =-≥,{0,1,2}B =,则A B =

A .{0}

B .{1}

C .{1,2}

D .{0,1,2}

14.已知集合{1A =-,0,1,2},2{|1}B x x =,则(A

B = )

A .{1-,0,1}

B .{0,1}

C .{1-,1}

D .{0,1,2}

15.若(1)2z i i +=,则(z = ) A .1i -- B .1i -+

C .1i -

D .1i +

16.(1i)(2i)+-= A .3i --

B .3i -+

C .3i -

D .3i +

17.复平面内表示复数(2)z i i =-+的点位于 A .第一象限

B .第二象限

C .第三象限

D .第四象限

18若43i z =+,则||z

z =

(A )1

(B )1-

(C )43+i 55 (D )

43

i 55- 19.已知复数z 满足(1)1z i i -=+,则z =

(A )2i -- (B )2i -+ (C )2i - (D )2i + 20.设

的实部与虚部相等,其中a 为实数,则a=

(A )−3(B )−2(C )2(D )3 21.下列各式的运算结果为纯虚数的是

A .i(1+i)2

B .i 2(1-i)

C .(1+i)2

D .i(1+i)

22.设1i

2i 1i

z -=

++,则z = A .0

B .12

C .1

D

23.设312i

z i -=

+,则||(z = ) A .2 B

C

D .1

24.若a 为实数,且

231ai

i i

+=++,则a = A .-4

B .-3

C .3

D .4

设复数z 满足,则=

(A ) (B ) (C )( D )

i 3i z +=-z 12i -+12i -32i +32i -

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