Find the derivative of f(x)=1x+1f(x) = \frac{1}{x+1}f(x)=x+11.
−(x+1)−2-(x+1)^{-2}−(x+1)−2
(x+1)−2(x+1)^{-2}(x+1)−2
−(x+1)−1-(x+1)^{-1}−(x+1)−1
−1-1−1