若集合U={1,2,3,4,5,6,7},A={1,3,5,7,},B={1,3,5,6,7},则集合∁U(A∩B)是( )A.{2,4,6}B.{1,3,5
题型:单选题难度:简单来源:不详
若集合U={1,2,3,4,5,6,7},A={1,3,5,7,},B={1,3,5,6,7},则集合∁U(A∩B)是( )A.{2,4,6} | B.{1,3,5,7} | C.{2,4} | D.{2,5,6} |
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答案
因为A={1,3,5,7,},B={1,3,5,6,7}, ∴A∩B={1,3,5,7}. ∵U={1,2,3,4,5,6,7}; ∴CU(A∩B)={2,4,6}. 故选:A. |
举一反三
设全集U=R,A={x|≥0},∁UA=(-1,-a),则a+b=( ) |
已知集合M={y|y=x2-1,x∈R},N={x|y=},则M∩N=( )A.[-1,+∞) | B.[-1,] | C.[,+∞) | D.∅ |
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已知集合P={0,m},Q={x|2x2-5x<0,x∈Z},若P∩Q≠∅,则m等于( ) |
已知集合M={x|x<1},N={x|2x>1},则M∩N=( )A.∅ | B.{x|x<0} | C.{x|x<1} | D.{x|<x<1} |
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设全集U={1,2,3,4,5,6,7,8,9},∁U(A∪B)={1,3},∁UA∩B={2,4},则集合B=( )A.{1,2,3,4} | B.{1,2,3,4,5} | C.{5,6,7,8,9} | D.{7,8,9} |
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