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Re:参看了高德纳的《计算机程序设计艺术》才过了

Posted by zyfans at 2007-08-02 15:00:32 on Problem 1423
In Reply To:参看了高德纳的《计算机程序设计艺术》才过了 Posted by:redraiment at 2007-05-22 19:53:09 
> 第一卷里有个公式
> n! = sqrt(2*π*n) * ((n/e)^n) * (1 + 1/(12*n) + 1/(288*n*n) + O(1/n^3))
> 
> π = acos(-1)
> e = exp(1)
> 
> 忽略无穷小 O(1/n^3)
> 
> 接下来就很简单了。
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