Trouble with wording of this math question "Find the derivative as follows (you need not simplify)":
a) $y = 2^x f (x)$, where $f (x)$ is a differentiable function and so is $f '(x)$: find $\frac{d^2x}{dx^2}$.
That's the exact wording of the question, and no additional information is given outside of this question.  Can anyone make sense out of this question? I'm not looking for a solved answer, just an idea of what I'm actually supposed to be doing. Thanks

We are given:
$$y = 2^x f(x)$$ 
where $f(x)$ and $f'(x)$ are differentiable functions and asked to find the second derivative.
This is just an application of the product rule, so 
$\displaystyle \frac{d}{dx} \left(2^x f(x)\right) = 2^x (f(x) \log(2) + f'(x))$
$\displaystyle \frac{d^2}{dx^2} \left(2^x f(x)\right) = 2^x (f(x) log(2)^2 + 2\log(2) f'(x) + f''(x))$
