1. Determine the radius of convergence of the following series. Show your solutions. (a). $\sum_{m=0}^{\infty} \frac{ (-1)^{m}}{k{m}} x* [2 m)$ (b). $\sum_{m=0}^{\infty} \frac{(2)^{m} }{3} x^{2 m} $ SP.SD.474