Sum of Factorial

Printable View

January 4th 2011, 11:51 AM
Wurz

Sum of Factorial

need to find the sum of (1/n!)
from n= 1 to infinity
January 4th 2011, 11:55 AM
snowtea

$\sum_{n=1}^\infty \frac{1}{n!} = \sum_{n=1}^\infty \frac{1^n}{n!} = (\sum_{n=0}^\infty \frac{1^n}{n!}) - 1 = e^1 - 1 = e - 1$
January 4th 2011, 12:10 PM
Wurz

thank alout

All times are GMT -8. The time now is 09:56 PM.