若全集U={1,2,3,4,5,6},M={2,3},N={1,4},则集合{5,6}等于( )A.M∪NB.M∩NC.(CuM)∪(CuN)D.(CuM)∩
题型:单选题难度:一般来源:江西
若全集U={1,2,3,4,5,6},M={2,3},N={1,4},则集合{5,6}等于( )A.M∪N | B.M∩N | C.(CuM)∪(CuN) | D.(CuM)∩(CuN) |
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答案
由题意全集U={1,2,3,4,5,6},M={2,3},N={1,4}, 观察知,集合{5,6}=Cu(M∪N) 又Cu(M∪N)=(CuM)∩(CuN) ∴(CuM)∩(CuN)={5,6}. 故选D. |
举一反三
设全集U={-1,0,1,2,3,4},A={-1,0,1},B={0,1,2,3},则CU(A∪B)=______. |
设集合A={x 题型:ax-b|<2,a>0},B={x|1<x<5},若A=B,求a,b的值. |
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