Quotient Rule for Derivative | How to take the derivative of the quotient?

Hello everyone. This lesson we will tell the quotient rule for derivative.

Quotient Rule for Derivative

quotient rule derivative

Let ݂f(x) and ݃g(x) be two functions. Then the derivative of the quotient:

$(\frac{f(x)}{g(x)})'=\frac{f'(x).g(x)-f(x).g'(x)}{[g(x)]^2}$

This is how the derivative of the quotient is taken. Now let's reinforce the issue with an example.

Example:

What is the derivative of $(\frac{x^3}{e^x})'$

$(\frac{x^3}{e^x})'=\frac{(x^3)'.e^x-x^3.(e^x)'}{(e^x)^2}$

$=\frac{3x^2e^x-x^3e^x}{(e^x)^2}$

$=\frac{x^2e^2.(3-x)}{(e^x)^2}$

$=\frac{x^2(3-x)}{e^x}$