已知全集U={0,1,2,3,4,5,6},A={2,4,5},B={0,1,3,5},则A∪(∁UB)=( )A.{5}B.{2.4}C.{2,4,5,6}
题型:单选题难度:简单来源:不详
已知全集U={0,1,2,3,4,5,6},A={2,4,5},B={0,1,3,5},则A∪(∁UB)=( )A.{5} | B.{2.4} | C.{2,4,5,6} | D.{0,1,2,3,4,5} |
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答案
由题意可得∁UB={2,4,6},故A∪(∁UB)={2,4,5,6}, 故选C. |
举一反三
设集合U={1,2,3,4,5},A={1,2,3},B={3,4,5},则∁U(A∩B)=______. |
已知全集U={x|x2-7x+10≥0},A={x题型:x-4|>2},B={x|≥0},求:∁UA,A∩B. |
难度:|
查看答案 设A、B是两个非空集合,定义A×B={x|x∈A∪B且x∉A∩B},已知A={x|y=},B={y|y=2x,x>0},则A×B=( )A.[0,1]∪(2,+∞) | B.[0,1)∪(2,+∞) | C.[0,1] | D.[0,2] |
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已知集合A={x|ax-1=0},B={x|x2-3x+2=0},且A⊆B,求实数a的值. |
设全集U={2,3,a2+2a-3},A={|a+1|,2},∁UA={5},求a的值. |