2楼: Originally posted by hank612 at 2016-06-10 02:43:02
楼主首先把积分变量和积分下限的符号区分开来吧, 免得添乱, 譬如, (9)式:

\alpha=\int_{\lambda}^{\infty} \frac{dt}{(a^2+t)\Delta}

这样一来, 每一个偏导都很简单,就是多用几回链式法则, 举例,
\frac{\par ...

4楼: Originally posted by zhijian_duan at 2016-06-11 10:29:33
你还是用软件去做吧，简单！