Thank you,
I have few questions
1. Is it that you choose [latex] (z  i) [/latex] terms because the question specifies it should converge in [latex] 0 < zi < R [/latex] ?
2. So [latex]\frac{B}{z + i} [/latex] will be expanded like
[latex]\frac{1}{2i} * \frac{1}{1+\frac{zi}{2i}} = \sum_{n=0}^{\infty}{s^n}[/latex]
where
[latex] s = \frac{zi}{2i}[/latex]
so the answer to the solution would be
[latex]\frac{A}{zi} + \{expansion\, in\, 2\}[/latex] ?
Thanks again
