MathProblemsBank

10.8.8 Series with complex terms

Problem: Expand \( f(z) \) into Laurent series (Taylor) into the given ring or neighborhood of the given point (in this case indicate the domain of convergence of the obtained series). \[ f(z)=\frac{1}{(z+1)(z-3)^{2}}, \quad 1<|z|<3 . \]