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MathGroup Archive 2007

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Re: Improper Integral & Mathematica

  • To: mathgroup at smc.vnet.net
  • Subject: [mg80614] Re: Improper Integral & Mathematica
  • From: "Steve Luttrell" <steve at _removemefirst_luttrell.org.uk>
  • Date: Sun, 26 Aug 2007 23:18:14 -0400 (EDT)
  • References: <faraa2$4k6$1@smc.vnet.net>

Use E rather than e so that Mathematica knows what you mean.

Integrate[(E^x)/(1 + E^(2 x)), {x, -Infinity, +Infinity}]

Pi/2

-- 
Steve Luttrell
West Malvern, UK


<expizzaiolo at gmail.com> wrote in message news:faraa2$4k6$1 at smc.vnet.net...
> 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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