设集合M={4,5,6,8},集合N={3,5,7,8},那么M∪N=[ ]A.{3,4,5,6,7,8}B.{5,8}C.{3,5,7,8}D.{4,
题型:单选题难度:简单来源:四川省高考真题
设集合M={4,5,6,8},集合N={3,5,7,8},那么M∪N= |
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A.{3,4,5,6,7,8} B.{5,8} C.{3,5,7,8} D.{4,5,6,8} |
答案
A |
举一反三
若A={x|x2=1},B={x|x2-2x-3=0},则A∩B= |
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A.{3} B.{1} C. D.{-1} |
已知全集U={1,2,3,4,5},且A={2,3,4},B={1,2},则A∩(CUB)等于 |
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A.{2} B.{5} C.{3,4} D.{2,3,4,5} |
若集合A={1,3},B={2,3,4},则A∩B= |
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A.{1} B.{2} C.{3} D.{1,2,3,4} |
已知集合A={x|x<a},B={x|1<x<2},且A∪CRB=R,则实数a的取值范围是 |
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A.a≤1 B.a<1 C.a≥2 D.a>2 |
若集合A={x|-2≤x≤3},B={x|x<-1或x>4},则集合A∩B等于 |
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A.{x|x≤3或x>4} B.{x|-1<x≤3} C.{x|3≤x<4} D.{x|-2≤x<-1} |
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