Author Topic: TUT0401  (Read 964 times)

Weiyin Wu

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TUT0401
« on: February 16, 2020, 08:26:05 PM »
Find the radius of convergence of the given power series.
$$\sum_{k=1}^{\infty} k(z-1)^{k}$$
$$\frac{1}{R}=\lim_{k\to\infty} |\frac{a_{k+1}}{a_{k}}|=\lim_{k\to\infty} |\frac{k+1}{k}|=1$$
$$R=1$$