How to know basics about convergence

1. How do you tell if an is convergent or divergent?

How do you tell if an is convergent or divergent?

A convergent series is a series whose partial sums tend to a specific number, also called a limit. A divergent series is a series whose partial sums, by contrast, don't approach a limit. Divergent series typically go to ∞, go to −∞, or don't approach one specific number.