Let y = f (x), f '(x) exist, and find the derivative of y = f (2 ^ x)

Let y = f (x), f '(x) exist, and find the derivative of y = f (2 ^ x)

y'=[f(2^x)]'
=[f'(2^x)]×(2^x)'
=[(2^x)(ln2)]×[f'(2^x)]