设全集U={1,2,3,4,5,6,7,8},集合S={1,3,5},T={3,6},则∁U(S∪T)等于( )A.φB.{2,4,7,8}C.{1,3,5,
题型:单选题难度:一般来源:泸州一模
设全集U={1,2,3,4,5,6,7,8},集合S={1,3,5},T={3,6},则∁U(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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答案
∵S∪T={1,3,5,6}, ∴CU(S∪T)={2,4,7,8}. 故选B. |
举一反三
设集合U={0,1,2,3,4,5},A={1,2},B={x∈z|x2-5x+4<0},则∁∪(A∪B)=______. |
设集合M={x|lnx2=lnx,x∈R},N={n∈Z|-1≤n≤3},则M∩N=( ) |
M={x|x2+x-6≤0},N={x题型:2x+1|>3},则M∩N=( )A.(-3,-2]∪[1,2] | B.[-3,-2)∪(1,2] | C.(-3,-2)∪(1,+∞) | D.(-∞,-3)∪(1,2] |
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难度:|
查看答案 已知集合M={-4,-3,-2,-1,0,1,4},N={-3,-2,-1,0,1,2,3},且M,N都是全集I的子集,则图中阴影部分表示的集合为( )A.{-1,-2,-3} | B.{0,1,2,3} | C.{2,3} | D.{0,-1,-2,-3} |
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M∪{1}={1,2,3}的集合M的个数是______. |