Apr 17, 2012 Thread starter Banned #1 P Poirot Banned Feb 15, 2012 250 express $\frac{1}{z+1}$ as a power series about z=1. My working: I know $\frac{1}{z+1}=1-z+z^2-z^3+.....$ but this is macluarin series.

express $\frac{1}{z+1}$ as a power series about z=1. My working: I know $\frac{1}{z+1}=1-z+z^2-z^3+.....$ but this is macluarin series.

Apr 17, 2012 #2 G girdav Member Feb 1, 2012 96 Write $\frac 1{1+z}=\frac 1{2+(z-1)}=\frac 12\frac 1{1+\frac{z-1}2}$.