- 【例4.5】集合的划分
题面翻译
- 2025-7-19 16:11:42 @
1.任意的子集合里不能没元素
2和3可以总结成一句话:任意一个元素必须且只能属于一个子集合
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1.任意的子集合里不能没元素
2和3可以总结成一句话:任意一个元素必须且只能属于一个子集合
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