【题文】(12分)已知全集U={1,2,3,4,5,6,7,8,9,10,11,13},集合A={2,4,6,8},B={3,4,5,6,8,9,11},求:(
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【题文】(12分)已知全集U={1,2,3,4,5,6,7,8,9,10,11,13},集合A={2,4,6,8},B={3,4,5,6,8,9,11},求:
(1)A∪B
(2)CUA
(3)CU(A∩B)
(4)A∪(CUB)
答案
【答案】(1)A∪B ={2,3,4,5,6,8,9,11}
(2)CUA="{1,3,5,7,9,10,11,13}"
(3)CU(A∩B)={1,2,3,5,7,9,10,11,13};
(4) A∪(CUB)={1,2,4,6,7,8,10,13}。
解析
【解析】本小题根据交集、并集、补集的定义求解即可.
(1)A∪B ={2,3,4,5,6,8,9,11}……………………3分
(2)CUA={1,3,5,7,9,10,11,13} ……………………6分
(3)A∩B ={4,6,8} ……………………7分
CU(A∩B)={1,2,3,5,7,9,10,11,13}…………………9分
(4) CUB ="{1,2,7,10,13}" …………………10分
A∪(CUB)={1,2,4,6,7,8,10,13}……………………12分
举一反三
【题文】若集合
则集合B不可能是( )
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