初等数学并不能严格定义自然数、整数、有理数、实数等,可为什么能用初等数学方法证明根号 2 是无理数? 知乎 Template




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tomski初等数学并不能严格定义自然数、整数、有理数、实数等,可为什么能用初等数学方法证明根号 2 是无理数? coloring