Checking a calculus problem with chain rule and FTC

[ku1005]

Hey Guys, this is one of the Q's in my book which I have completed but would just like to check whether (a) it is correct and B whether I can leave it in this format for the answer?

cheers

I used the fundamental theorem part 1 and the chain rule due to upper limit of integration being x^3. I posted as attachements as my text wouldn't work in here.thanks heaps!

rhys

 

[Glass]

I can't see your picture unfortunately.