C4 Indices Question

Just need someone to explain this question from the 2007 Jan paper.

I don't get part b) of the question, and how you can use part a) to help you figure part b out.

Does it simply become e^((x^2)ln2)

Could someone please explain?

Thanks in advance

Set u = x^2 and use the chain rule $\frac{dy}{dx} = \frac{du}{dx}\frac{dy}{du}$

Is the working on the image by you? or is that the mark scheme? It looks right to me...

Ah, it's late at night, what would be dy/du?

Late at night is no excuse for a potential Caian! If you set u=x^2, y=2^u, so dy/du is just what you found in part a
edit: too slow...

Just need someone to explain this question from the 2007 Jan paper.

I don't get part b) of the question, and how you can use part a) to help you figure part b out.

Does it simply become e^((x^2)ln2)

Could someone please explain?

Thanks in advance