Find
This one has got me well knobbed. I don't even know where to start. Maybe root the whole thing? Can someone give me a pointer please?
I did that but then I get an answer with loads of y's and dy/dx's and I don't know how to clean it up...?
EDIT: Ok, I re-did it and got this horrendously disgusting answer? I don't think its right at all? :S