- #1
mateomy
- 307
- 0
I have a specific problem but more than figuring out the answer I just want to figure out how to deal with factorials. My book is less than helpful on it...
The problem is...
[tex]
\sum_{n=1}^{\infty} (-1)^n \frac{n^n}{n!}
[/tex]
I understand that I have to take the limit of the sequence (aside from determining an overall decreasing function), I just don't know what to do with the factorial. I am pretty sure I can't take a limit of a factorial. Can someone give me an example (using another problem if necessary) of what I should do with them.
Thanks.
The problem is...
[tex]
\sum_{n=1}^{\infty} (-1)^n \frac{n^n}{n!}
[/tex]
I understand that I have to take the limit of the sequence (aside from determining an overall decreasing function), I just don't know what to do with the factorial. I am pretty sure I can't take a limit of a factorial. Can someone give me an example (using another problem if necessary) of what I should do with them.
Thanks.