For each of these, write out the first, say, four or five terms and see how they add.
Decide whether each of the following series converges. If a given series converges, compute its sum. Otherwise, enter INF if it diverges to infinity, MINF if it diverges to minus infinity, and DIV otherwise.
1.
2.
3.
I don't understand how to solve these. Please help.
All three are telescoping series. Read here (scroll down a bit): Pauls Online Notes : Calculus II - Series - Special Series