来自吕南斗的问题
一道简易逻辑题：请问命题：“任意实数x1、x2且x1<x2,x1的立方<x2的立方”的否定是什么?
一道简易逻辑题：
请问命题：“任意实数x1、x2且x1
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2020-04-16 07:13
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葛树恩
存在实数X1、X2且X1
2020-04-16 07:17:53
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