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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!
> 
> 



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