# Can anyone show this exponential proof?

• May 5th 2010, 06:55 AM
Mathman87
Can anyone show this exponential proof?
Can anyone show the following:

$N^N$ $e^{-N}$ $\leq$ $e^{-1}$ x N! $\leq$ N x $N^N$ $e^{-N}$

N.B. The "x" are multiplication signs
• May 5th 2010, 10:28 AM
Tikoloshe
Use Stirling’s approximation.
• May 5th 2010, 04:47 PM
Mathman87
I dont know how to use that? could you show me how its done?