Which of the following p-series converge? (i) ∑n=1∞1n1.5\sum_{n=1}^{\infty} \frac{1}{n^{1.5}}∑n=1∞n1.51; (ii) ∑n=1∞1n0.8\sum_{n=1}^{\infty} \frac{1}{n^{0.8}}∑n=1∞n0.81; (iii) ∑n=1∞1n2\sum_{n=1}^{\infty} \frac{1}{n^2}∑n=1∞n21
(i) only
(ii) only
(i) and (iii)
All three