Question(1 point)
Classify each series as absolutely Convergent, Conditionally Convergent, or Divergent. (a) $\sum_{k=1}^{\infty} \frac{(-7)^{k}}{k^{2}}$ ? (b) $\sum_{k=1}^{\infty} \frac{(-1)^{k+1}}{k!}$ ?