# Question 763d2

Oct 5, 2016

$- \frac{1}{2} {x}^{- \frac{3}{2}}$
We know that the derivative of ${x}^{n}$ is $n {x}^{n - 1} .$
Since, $\frac{1}{\sqrt{x}}$ is x^(-1/2#, its drivative is, $- \frac{1}{2} {x}^{- \frac{1}{2} - 1}$, i.e.,
$- \frac{1}{2} {x}^{- \frac{3}{2}} .$