已知全集U={1,2,3,4,5},集合A={x|x2-3x+2=0},B={x|x=2a,a∈A},则集合∁U(A∪B)中元素的个数为( ) A.1 B.2 C.3 D.4 |
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已知全集U={0,1,2,3,4,5},集合M={0,3,5},M∩(∁UN)={0,3},则满足条件的集合N共有( ) A.4个 B.6个 C.8个 D.16个 |
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满足M⊆{a1,a2,a3,a4},且M∩{a1,a2,a3}={a1,a2}的集合M的个数是( ) A.1 B.2 C.3 D.4 |
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已知集合U={1,2,3,4,5,6,7},A={2,4,5,7},B={3,4,5},则(∁UA)∪(∁UB)=( ) A.{1,6} B.{4,5} C.{2,3,4,5,7} D.{1,2,3,6,7} |
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已知集合S={x∈R|x+1≥2},T={-2,-1,0,1,2},则S∩T=( ) A.{2} B.{1,2} C.{0,1,2} D.{-1,0,1,2} |
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已知全集U=Z,A={-1,0,1,2},B={x|x2=x},则A∩∁UB为( ) A.{-1,2} B.{-1,0} C.{0,1} D.{1,2} |
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设A={x∈Z||x|≤6},B={1,2,3},C={3,4,5,6},求: (1)A∩(B∩C); (2)A∩CA(B∪C). |
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设全集U={0,1,2,3,4,5},A∩B={1},A∩(∁UB)={2},(∁UA)∩(∁UB)={0,5},则(∁UA)∪B= . | |
已知集合A={0,m},B={n|n2-3n<0,n∈Z}若A∩B≠∅,则m的值为 . | |
设集合A={-3,0,1},B={t2-t+1}.若A∪B=A,则t= . | |