$f(x) = \frac{x + 1}{x - 1}$

A cura di: Administrator

$f(x) = frac{x + 1}{x – 1}$
$f'(x) = frac{1cdot (x – 1) – (x + 1)cdot 1}{(x – 1)^2} =$ $frac{-2}{(x – 1)^2}$