# Math Help - I'm stuck on this series as well :(

1. ## I'm stuck on this series as well :(

Question:

Determine:
(a) whether is convergent.
(b) whether is convergent.

All I know to do is 10 * (5/5^n) and then I'm stuck and I'm not even sure that I am on the right track or if what I did is absolutely pointless.

Any help would be greatly appreciated!

2. Originally Posted by s3a
Question:

Determine:
(a) whether is convergent.
(b) whether is convergent.

All I know to do is 10 * (5/5^n) and then I'm stuck and I'm not even sure that I am on the right track or if what I did is absolutely pointless.

Any help would be greatly appreciated!
3. That is a simple geometric series with $a=10~\&~r=\frac{1}{5}$.