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Re: Improper Integral & Mathematica


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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