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MathGroup Archive 1997

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Infinite sums

  • To: mathgroup at smc.vnet.net
  • Subject: [mg9128] Infinite sums
  • From: Jonathan Arthur <arthur_j at chem.usyd.edu.au>
  • Date: Tue, 14 Oct 1997 10:01:47 -0400
  • Organization: Information Technology Services, The University of Sydney, NSW, Australia
  • Sender: owner-wri-mathgroup at wolfram.com

Hello,

I recently typed in the following example from page 833 of the version
3.0 
Mathematica book into version 2 of Mathematica.

Sum[x^n/n!, {n, 0, Infinity}]

The book says that Mathematica should simplify this to E^x However in
version 
2.0 of the program this does not work (ie it does not simplify the
expression
at all) Is this a limitation of the previous version that it cannot
simplify
infinite sums?

I tried other sums which also simplify (ie I can do them on paper) but
they
don't simplify either.

Any help on using Mathematica for infinte sums in general would be
appreciated.

Thanks,

Jonathan


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