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