Re: Upper bound for \sum{k=n}^\infty (x^k / k!)

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#28

From: Pierre Asselin
Date: Fri, 03 Dec 1999 00:00

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"Enrico Talinucci" <talinucci@tin.it> writes:

>I need to upper bound the following sum:
>S(n) = \sum_{k=n}^\infty (x^k/k!)

Hint: for k>n,  x^k/k! is less than (x^n/n!) * (x/n)^(k-n) .

--
--Pierre Asselin, Westminster, Colorado
  lpa@netcom.com

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From: lpa@netcom17.netcom.com (Pierre Asselin)
Subject: Re: Upper bound for \sum{k=n}^\infty (x^k / k!)
Date: 1999/12/03
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