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