y=arctanx+1\x-1的导数?

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$y=arctanx+1\x-1的导数?$

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y=arctanx+1\x-1的导数?
y=arctanx+1\x-1的导数?

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

1/(1+x^2)-1/x^2

y“=1/1+x^2-/(x-1)^2