In 25 and 26, expand f (z) 7z 2 3 z(z 2 1) in a Laurent series valid for the indicated
Chapter 19, Problem 25(choose chapter or problem)
In Problems 25 and 26, expand \(f(z)=\frac{7 z-3}{z(z-1)}) in a Laurent series valid for the indicated annular domain.
\(0<|z|<1\)
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