Question

determine if the series is converging or diverging ln/n from n=1 to n=infinity...which test do you use?

Answer 1

http://tutorial.math.lamar.edu/Classes/CalcII/ConvergenceOfSeries.aspx
visit this link u have a clear idea about ur question

Answer 2

If you are unsure, I would say use ratio test. It usually works. But if the series looks like its easily integrable, use integral test. I'm sure you've done enough integrals to see whether a series looks like an easy integral.