- #1

MartinKitty

- 3

- 0

I have a problem with finding a residue of a function:

[itex]f(z)={\frac{z^3*exp(1/z)}{(1+z)}}[/itex] in infinity.

I tried to present it in Laurent series:

[itex]\frac{z^3}{1+z} sum_{n=0}^\infty\frac{1}{n!z^n}[/itex]

I know that residue will be equal to coefficient [itex]a_{-1}[/itex], but i don't know how to find it.