I could guess but it would help if you can tell me what "n" is.
Is there a section of the notes before this that you haven't posted?
Difficult to tell with such scant detail, but I suspect that you have to have to be able to differentiate x^n from first principals for rational n.
Thanks for posting! You just need to create an account in order to submit the post
Already a member?
Oops, something wasn't right
please check the following:
Not got an account?
Sign up now
© Copyright The Student Room 2015 all rights reserved
The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.
Register Number: 04666380 (England and Wales), VAT No. 806 8067 22
Registered Office: International House, Queens Road, Brighton, BN1 3XE