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) -- To reply via email subtract one hundred and four