【题文】设U="{1,2,3,4,5}," A="{1,2,3}," B="{2,4}," 则A∪ =
【题文】设U="{1,2,3,4,5}," A="{1,2,3}," B="{2,4}," 则A∪ =
题型:难度:来源:
【题文】设
U="{1,2,3,4,5},"
A="{1,2,3},"
B="{2,4}," 则
A∪
=
答案
【答案】
解析
【解析】略
举一反三
【题文】
【题文】
【题文】已知全集
U={1,2,3,4,5,6,7,8},
M ={1,3,5,7},
N ={5,6,7},则(C
UM)∩ ( C
UN)=" " ( )
A.{5,7} | B.{2,4} | C.{2,4,8} | D.{1,3,5,6,8} |
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