2. Let Σ an be a positive series. Note that either y a converges (so partial sums converge to a limit), or the partial sums sy approach oo as j grows wit hout bound (and we associate Σ an with oo). COMPARISON TEST: Let Σ an and Σ bn be positive series. i. If Σ an converges and 0 m an for all n, then Σ bn converges. ii. If Σ an diverges and 0