已知U={2,3,4,5,6},M={3,4,5},N={2,4,5,6},则( )A.M∩N={4,6}B.M∪N=UC.(CUN)∪M=UD.(CUM)∩
题型:单选题难度:简单来源:不详
已知U={2,3,4,5,6},M={3,4,5},N={2,4,5,6},则( )A.M∩N={4,6} | B.M∪N=U | C.(CUN)∪M=U | D.(CUM)∩N=N |
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答案
∵U={2,3,4,5,6},M={3,4,5},N={2,4,5,6}, ∴M∩N={4,5},故选项A错误;M∪N={2,3,4,5,6}=U,故选项B正确; ∵CUN={3},∴(CUN)∪M={3,4,5}=M,故选项C错误; ∵CUM={2,6},∴(CUN)∩N={2,6}≠N,故选项D错误, 故选B |
举一反三
已知全集U={1,2,3,4,5},A={1,2},B={1,2,4},则CU(A∪B)=______. |
已知集合A={1,3,5},B={2,3,4},A∩B=______. |
已知集合M={0,1,2,3,4},N={1,3,5},则M∩N=( )A.{1,2,3} | B.{1,3,5} | C.{1,3} | D.{1,5} |
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集合M={3,2a},N={a,b},a,b为实数,若M∩N={2}则M∪N=( )A.{0,1,2} | B.{0,1,3} | C.{0,2,3} | D.{1,2,3} |
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全集U={x|1≤x≤9,x∈Z},A={1,2,3},B={3,4,5,6},则CU(A∪B)=______. |
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