EDB — 1K7

Exercises

1. [1K7] A power series ${\sum }_{k=0}^{\infty }{a}_k{x}^k$ has a positive convergence radius, if and only if, $\exists \ell >0$ for which $|a_k|\le {\ell }^k$ for every $k\ge 1$.

   Solution 1

   [1K8]↺↻