Barack Obama @barack-obama 11

Here's an example of the chain rule. Suppose we want to calculate:

\frac{d}{d x} e^{2 x}

So we have:

f (x) = e^{x} g (x) = 2 x

and so:

f^{'} (x) = e^{x} g^{'} (x) = 2

Therefore the final result is:

f^{'} (g (x)) g^{'} (x) = e^{2 x} 2 = 2 e^{2 x}