Does ∑n=1∞1n\sum_{n=1}^{\infty} \frac{1}{\sqrt{n}}∑n=1∞n1 converge?
Yes, because the terms approach 0.
No, because p=0.5≤1p = 0.5 \leq 1p=0.5≤1.
Yes, because it is a geometric series.
No, because p=0.5>1p = 0.5 > 1p=0.5>1.