Re: Improper Integral & Mathematica

*To*: mathgroup at smc.vnet.net*Subject*: [mg80633] Re: [mg80577] Improper Integral & Mathematica*From*: Bob Hanlon <hanlonr at cox.net>*Date*: Sun, 26 Aug 2007 23:28:11 -0400 (EDT)*Reply-to*: hanlonr at cox.net

If e is supposed to be the exponential constant then Integrate[(E^x)/(1 + E^(2 x)), {x, -Infinity, Infinity}] Pi/2 Bob Hanlon ---- expizzaiolo at gmail.com wrote: > Hi all ! :-) > > how to solve: > > Integrate[(e^x) / (1 + e^(2x)), {x, - Infinity, + Infinity }] > > using Mathematica? I'm trying "e^x = t" but won't work... > > > > TNX! > >