- #1

skrat

- 748

- 8

## Homework Statement

Expand ##f(z)=\frac{1}{z^2(z-1)}## in Laurent series for ##0<|z-1|<1##. Use binomial series.

## Homework Equations

## The Attempt at a Solution

I am looking at this problem for quite some time now and still I got nothing.

I do however think that this will come in handy ##\frac{1}{z^2(z-1)}=\frac{1}{z}-\frac{1}{z^2}-\frac{1}{z-1}##. That's all I have and not even a clue on how to continue ... Please help.