已知集合M满足条件{1,2}子集M真子集{1,2,3,4,5}写出M的集合
人气:419 ℃ 时间:2020-04-01 08:34:13
解答
﹛1,2﹜
﹛1,2,3﹜;﹛1,2,3,4﹜;﹛1,2,3,5﹜
﹛1,2,4﹜;﹛1,2,4,5﹜
﹛1,2,5﹜
共7个
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