Posted by haifeng on 2014-09-19 12:11:15 last update 2014-09-19 12:11:30 | Answers (1) | 收藏
求极限
\[ \lim_{n\rightarrow\infty}\biggl(\frac{1}{n^3+1}+\frac{4}{n^3+2}+\cdots+\frac{n^2}{n^3+n}\biggr) \]
