Re: Improper Integral & Mathematica
- To: mathgroup at smc.vnet.net
- Subject: [mg80622] Re: Improper Integral & Mathematica
- From: Bill Rowe <readnewsciv at sbcglobal.net>
- Date: Sun, 26 Aug 2007 23:22:28 -0400 (EDT)
On 8/26/07 at 3:11 AM, expizzaiolo at gmail.com wrote:
>how to solve:
>Integrate[(e^x) / (1 + e^(2x)), {x, - Infinity, + Infinity }]
>using Mathematica? I'm trying "e^x = t" but won't work...
I am going to assume that you really mean
Integrate[Exp[x]/(!+exp[2 x],{x,-Infinitu, Infinity}] or
Integrate[(eEx) / (1 + E^(2x)), {x, -Infinity, Infinity}]
rather than what you posted. If so,
In[4]:= Integrate[Exp[x]/(1 + Exp[2*x]), {x, -Infinity, Infinity}]
Out[4]= Pi/2
In[5]:= $Version
Out[5]= 6.0 for Mac OS X PowerPC (32-bit) (June 19, 2007)
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