Posted by haifeng on 2014-12-23 20:09:56 last update 2014-12-23 20:16:34 | Answers (2) | 收藏
求
\[\int\frac{x^2+1}{x^4+1}dx\]
用类似的方法, 求
\[\int\frac{x^2-1}{x^4+1}dx\]
