Does the series ∑n=1∞(−1)n⋅5n\sum_{n=1}^{\infty} \frac{(-1)^n \cdot 5}{n}∑n=1∞n(−1)n⋅5 converge?
Yes, by the Alternating Series Test
No, it diverges by the Divergence Test
Yes, it is a geometric series
No, it is a p-series with p<1p < 1p<1