1. ## Help with COMPLEX INTEGRATION please!

Hi in my textbook there is the following question and my teacher said one similar is likely to be in the final exam. Can anyone help?

let f(z) = (z^2 + 2z -5)/((z^2+4)(z^2+2z+2)) If C is the circle |z|=R show that lim (from R to infinity) of the cyclic integral f(z) dz=0

I don't really know where to start

2. ## Re: Help with COMPLEX INTEGRATION please!

Cauchy's theorem?