# What is the derivative of #sqrt(4x² + 1)#?

##### 1 Answer

Mar 20, 2018

#### Explanation:

The chain rule has you treat functions as follows:

You treat anything inside of the exponent as a second function, and you first take the derivative of the exponent, and **then** multiply by the derivative of the inner function.

For this problem:

Now, lets take our derivatives: