First slide

Diffrentiation

Question

$y = \frac{1}{x + 1} . Find \frac{d y}{d x}$

Easy

A

$- \frac{2}{(x + 1)^{2}}$
B

$- \frac{1}{(x - 1)^{2}}$
C

$- \frac{1}{(x + 1)^{2}}$
D

$\frac{1}{(x + 1)^{2}}$

Solution

$\frac{d y}{d x} = (- 1) {(x + 1)}^{- 2} = - \frac{1}{(x + 1)^{2}}$

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