Posted by haifeng on 2021-12-18 23:08:12 last update 2021-12-18 23:08:12 | Answers (0) | 收藏
设 f(x)=∫0xln(1−t)tdt 定义于 (−1,1) 内, 证明: f(x)+f(−x)=12f(x2).