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!
>
>