全集U={1,2,3,4,5,6,7,8,9},(CuA)∪(CuB)={2,3,4,6,7,8},(CuA)∩B={3,7},(CuA)∪B={1,3,5,6,7,8,9}.
求A,B.
人气:479 ℃ 时间:2019-10-23 03:26:37
解答
A={1,2,4,5,9}
B={1,3,5,7,9}
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