Here is my problem:
Let sum(a_k*z^k, k=0->infinity)
be the power series expansion of
I need to figure out a closed form expression for a_k.
My first problem is figuring out how to manipulate the function into something I know how to express (geometric series?).
Secondly (although this will probably be easier once I figure out issue number 1) is that I don't see how it will be obvious to express a_k unless you just explicitly get the power series.