1. The problem statement, all variables and given/known data Find all positive values of b for which the series Ʃ bln(n) converges. Bounds are from n=1 to infinity. 2. Relevant equations The assignment is for Direct Comparison Test and Limit Comparison Test. 3. The attempt at a solution I don't know where to begin. Using a comparison test would only indicate convergence or divergence. It seems like it might be a geometric series, but I'm not sure.