2.8.58 Power Series

Condition: determine the area of disintegration of the steppe row: a) \ (\ sum_ {n = 0}^{\ infty} \ frac {(x-1)^{n}} {(n+1)^{\ frac {4} {3}} \) \ ( \ sum_ {n = 0}^{\ infty} (-1)^{n} (2 n+1)^{2} x^{n} \).