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Sagot :

La dérivée de [tex]f(x)=\frac{x+1}{(x-1)^2}[/tex] est:

 

[tex]f'(x)=\frac{(x-1)^2-(x+1)\times 2(x-1)}{(x-1)^4}\\ f'(x)=\frac{(x-1)-2(x+1)}{(x-1)^3}\\ f'(x)=\frac{-x-3}{(x-1)^3}[/tex]

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