2楼: Originally posted by tomwls at 2014-11-13 17:52:49
题目似乎不妥啊？第二问若x 为零？

6楼: Originally posted by hank612 at 2014-11-14 05:09:17
\int_{0}^{\infty}\frac{g(s)}{s}ds=\sum_{n=1}^{\infty}\left(a_n\int_{(2n-1)!}^{(2n)!}\frac{1}{s} ds-\frac{a_n}{2}\int_{(2n)!}^{(2n+1)!}\frac{1}{s}ds\right)=\sum_{n=1}^{\infty}\frac{a_n}{2}\ln(2n-1+\fr ...