f(x)=(1+x)/(1-x)e^(-ax)的导数怎么求?
问题描述:
f(x)=(1+x)/(1-x)e^(-ax)的导数怎么求?
写的详细点~
答
f(x)=(1+x)/(1-x)e^(-ax)
f'(x)='
打字方便起见设 =x1
=x2
=(x1)'(x2)+(x1)(x2)' ...(1)
'=2/(1-x)^2...(2)
'=ae^ax.(3)
再带到(2),(3)带到(1)中即可求解