Derivative of Composite Function/Examples/(3x+1)^2

Example of Derivative of Composite Function

 * $\map {\dfrac \d {\d x} } {\paren {3 x + 1}^2} = 6 \paren {3 x + 1}$

Proof
Let $u = 3 x + 1$.

Let $y = u^2$.

Then we have:
 * $y = \paren {3 x + 1}^2$

and so: