August 11th, 2013, 02:29 PM  #1 
Newbie Joined: Aug 2013 Posts: 4 Thanks: 0  Evaluating a series with factorial
Here is the question: Evaluate sigma notation (from k=0 to infinity) (1/((e^k)(k!))) Thank you very much! 
August 11th, 2013, 03:21 PM  #2 
Senior Member Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,211 Thanks: 521 Math Focus: Calculus/ODEs  Re: Evaluating a series with factorial
Using the Maclaurin series: We then see that: 

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