已知全集U={x丨x≤4},集合A={x丨-2<x<3},B={x丨-3≤x≤2},求(CU A)∪B.
最好是有数轴的表示.
人气:391 ℃ 时间:2020-04-12 01:00:51
解答
由题意可知,
CU A={x丨x≤-2或3≤x≤4}
所以
(CU A)∪B={x丨x≤-2或3≤x≤4}∪{x丨-3≤x≤2}
={x丨3≤x≤4或x≤-2}
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