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来自MSN
12 天
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。
来自MSN
12 天
圆周率的计算:π在每个宇宙的值是否相同
圆周率π是一个无理数,其小数部分无限且不循环,无法用两个整数的比值精确表示。我们常用3.14或22/7作为π的近似值,但这些都只是方便计算的近似值,无法反映π的完整性质。那么,如果在其他宇宙中,圆周率的数值有所不同,这会给我们熟悉的宇宙特性带来哪些变化呢?
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