Firstly Sorry for all the threads, but i have a test on DE's quite soon and i want to clarify as much as possible really without getting on my tutors bad books(i.e. annoying the hell out of her

)

I can solve this sort

However this question is like this

I haven't a clue how to solve the particular when it ends like that. With my first example you just say

and work out the constants, but with this i am unsure.

I have worked out the

part

and get

But i haven't a clue where to start with

Please help, thanks.