y=arctan(x+1/x-1)导数

问题描述:

y=arctan(x+1/x-1)导数

y=arctanx+1\x-1 y'=1/[1+(x+1\x-1)^2]*(x+1\x-1)' =1/[1+(x+1\x-1)^2]*(-2)/(x-1)^2 =-1/(1+x^2)