设全集U={1,2,3,4},A={1,3},B={1,4},∁U(A∪B)=______.
题型:填空题难度:一般来源:不详
设全集U={1,2,3,4},A={1,3},B={1,4},∁U(A∪B)=______. |
答案
由A={1,3},B={1,4},所以A∪B={1,3,4}, 又x={1,2,3,4},所以∁x(A∪B)={2}. 故答案为{2}. |
举一反三
设全集U={1,2,3,4,5,6,7,8},集合A={1,2,3,5},B={2,4,6},则(CuA)∩B=( )A.{2} | B.{4,6} | C.{l,3,5} | D.{4,6,7,8} |
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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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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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