# Problem of the Week

## Updated at Nov 28, 2016 1:11 PM

For this week we've brought you this calculus problem.

How can we solve for the derivative of $$\frac{{x}^{4}}{9}$$?

Here are the steps:

$\frac{d}{dx} \frac{{x}^{4}}{9}$

 1 Use Constant Factor Rule: $$\frac{d}{dx} cf(x)=c(\frac{d}{dx} f(x))$$.$\frac{1}{9}(\frac{d}{dx} {x}^{4})$2 Use Power Rule: $$\frac{d}{dx} {x}^{n}=n{x}^{n-1}$$.$\frac{4{x}^{3}}{9}$Done(4*x^3)/9