Posted by haifeng on 2013-12-30 08:52:34 last update 2013-12-30 08:54:04 | Answers (0) | 收藏
即求极限
\[\lim_{m\rightarrow\infty}\sum_{k=1}^{m}\frac{1}{k(k+1)(k+2)\cdots(k+n)}\]
