已知全集U={1,2,3,4},集合M={1,3,4},N={1,2},则集合{2,3,4}=( )A.CUM∪CUNB.CUM∩CUNC.M∪ND.M∩N
题型:单选题难度:一般来源:不详
已知全集U={1,2,3,4},集合M={1,3,4},N={1,2},则集合{2,3,4}=( )A.CUM∪CUN | B.CUM∩CUN | C.M∪N | D.M∩N |
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答案
CUM={2},CUN={3,4} 选项A,CUM∪CUN={2,3,4},满足题意; 选项B,CUM∩CUN=?,不满足题意; 选项C,M∪N={1,2,3,4},不满足题意; 选项D,M∩N={1},不满足题意. 故选A. |
举一反三
设全集I={1,2,3,4,5,6,7},集合A={1,3,5,7},B={3,5}.则( ) |
已知a>b>0,全集I=R,M={x|b<x<},N={x|<x<a},则M∩=( )A.{x|b<x≤} | B.{x|<x<} | C.{x|b<x<} | D.{x|x<,或x≥a} |
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已知全集U={1,2,3,4,5,6},M={2,3,5},N={4,5},则集合{1,6}=( )A.M∪N | B.M∩N | C.CU(M∪N) | D.CU(M∩N) |
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已知全集U={1,2,3,4,5},集合A={1,3},B={3,4,5},则集合CU(A∩B)=( )A.{3} | B.{4,5} | C.{3,4,5} | D.{1,2,4,5} |
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已知集合A={1,2,3,4},集合B={2,3,4,5,6},则A∪B=( )A.{1,2,3,4} | B.{1,2,3,4,5,6} | C.{2,3,4,5,6} | D.{3,4} |
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