Hi CaptainBlack, appreciate your response.

I'm having difficulty simplifying the numerator here

When I do so I obtain:

To be honest I don't know if that's right, and if it is, I still don't know what to do with it.

This is my last question of my coursework and I have to hand it in today at 4-5pm-ish (yeah I apologise) so if could help me solve the numerator I would very much appreciate it so I can crack on with the graphs. This thread has revealed how desperately I lacking I am in certain areas of maths, and I'm a 3rd year level Electrical and Electronic Engineering student!