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π是无理数,圆的周长也应该是无理数,意味着圆周长不能是整数?
首先强调一点,π确实无理数,这点毋容置疑。有些人总是会下意识地强迫自己想象π在写到很多很多位数之后开始重复,这是不可能的。π是无理数在数学界早就得到了证明,而且证明方法不止一种,有兴趣的可以网上查找,证明方法并不难理解。
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