# Infinite Sequence Involving A Factorial

1. Sep 27, 2012

### Bashyboy

1. The problem statement, all variables and given/known data
$a_n = \frac{(2n -1)!}{(2n)^n}$

2. Relevant equations

3. The attempt at a solution
I am not exactly sure how to solve this problem.

2. Sep 27, 2012

### Ray Vickson

What are you supposed to do with an? Find its limit? Sum it?

RGV

3. Sep 27, 2012

### Bashyboy

Oh, I am sorry that I did not specify. I need to take the limit as n goes to infinity of this sequence.

4. Sep 28, 2012

### Bashyboy

Does it seem, to anyone, that I have left any more information out?

5. Sep 29, 2012

### ag3287

Hint: Try looking at a bound....what's it greater than, or what's it less than. Then take the limit of that, you should have your answer.