Questions asked
3. Find the radius of convergence of each of the following power series. (i) \( \sum n^{3} z^{n} \), (ii) \( \sum \frac{2^{n}}{n^{2}} z^{n} \), (iii) \( \sum \frac{2^{n}}{n !} z^{n} \). \( \frac{a}{2} \stackrel{0}{\stackrel{1}{L}} \)
