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## Homework Statement

Find the residue of the following function at z=1

## Homework Equations

f(z)=z^2/(z-1)^4(z-2)(z-3)

## The Attempt at a Solution

lim z→2 z^2/(z-1)^4(z-3)=-4

limz→3 z^2/(z-1)^4(z-2)=9/16

at z=1 of order 4?? using formula 1/m-1! d/dz{(z-a)^m f(z)}