f(z) = sin ( 1/(z-pi)) / 2z
1- Find the singularities of f , and all possible annulus centered at each singularity
2- Find the laurent series of f in each annulus
3- classify each singularity
4- compute the residue of at each singular point
use the maclaurin series of f(z)= [ (cos ^2) of z] - [ (sin ^2) of z ]
to compute integral on Curve for ( [ (cos ^2) of z] - [ (sin ^2) of z ] ) / ( z^53)
C :|z|=2 oriented positively
Find Sum of power series ,then answer the questions
1- series from 1 to infinity of [ {(-1)^(n+1)} .{ n} . { (z-1)^n} ] indicate the convergence nhd (neighborhood).
is series from 1 to infinity of [ n. {(1-4i)^n} convergent if yes compute its sum