设全集U={1,2,3,4,5,6,7,8},集合A={1,2,3,5},B={2,4,6},则(CuA)∩B=( )A.{2}B.{4,6}C.{l,3,5
题型:单选题难度:一般来源:山西模拟
设全集U={1,2,3,4,5,6,7,8},集合A={1,2,3,5},B={2,4,6},则(CuA)∩B=( )A.{2} | B.{4,6} | C.{l,3,5} | D.{4,6,7,8} |
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答案
∵全集U={1,2,3,4,5,6,7,8}, 集合A={1,2,3,5},B={2,4,6}, ∴CUA={4,6,7,8}, ∴(CuA)∩B={4,6}. 故选B. |
举一反三
命题“若A∩B=A,则A∪B=B”的逆否命题是( )A.若A∪B=B,则A∩B=A | B.若A∩B≠A,则A∪B≠B | C.若A∪B≠B,则A∩B≠A | D.若A∪B≠B,则A∩B=A |
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设集合A={1,2},则满足A∪B={1,2,3}的集合B的个数是( ) |
设全集U={1,2,3,4,5,6,7,8},集合S={1,3,5},T={3,6},则CU(S∪T)等于( )A.φ | B.{2,4,7,8} | C.{1,3,5,6} | D.{2,4,6,8} |
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已知集合A={0,1,2},集合B={x|x=2a,a∈A},则A∩B=( ) |
设集合A={1,2,3,4},集合B={1,3,5,7},则集合A∪B=( )A.{1,3} | B.{1,2,3,4,5,7} | C.{5,7} | D.{2,4,5,7} |
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