Recent content by MartinKitty

Then i get: \frac{z^3}{1+z}=(-1)^n*z^{n+3} and when i multiply I always get {z^3} with some fraction

Hello everyone, I have a problem with finding a residue of a function: f(z)={\frac{z^3*exp(1/z)}{(1+z)}} in infinity. I tried to present it in Laurent series: \frac{z^3}{1+z} sum_{n=0}^\infty\frac{1}{n!z^n} I know that residue will be equal to coefficient a_{-1}, but i don't know how to find it.