Solved: In 21 and 22, expand f (z) 1 z(1 2 z) 2 in a Laurent series valid for the
Chapter 19, Problem 22(choose chapter or problem)
In Problems 21 and 22, expand \(f(z)=\frac{1}{z(1-z)^{2}}\) in a Laurent series valid for the indicated annular domain.
\(|z|>1\)
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