Question

If $y=1/x^4$ then, $\frac{dy}{dx}$ will be

• A. $\frac{4}{x^3}$
• B. $4x^3$
• C. $-\frac{4}{x^5}$
• D. $-\frac{4}{x^4}$

Answer 1

The correct option is C $-\frac{4}{x^5}$

$y=x^{-4}$
$\frac{dy}{dx}=-4x^{-4-1}=-\frac{4}{x^5}$