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Question about Integration and citation

• To: mathgroup at smc.vnet.net
• Subject: [mg126269] Question about Integration and citation
• From: mehdimolu <mehdimortazawi at gmail.com>
• Date: Sat, 28 Apr 2012 05:24:47 -0400 (EDT)
• Delivered-to: l-mathgroup@mail-archive0.wolfram.com

Hi,
I need to perform an integration as follows:

---> Integrate[Log(1+a x)*x^n*E^(-b x),{x,0,Infinity}]

The Mathematica installed on my mac performs the integration and outputs
some results but when I use wolframalpha,the answer is "No more results
available", even after pressing "Try again with more time" button.

the other question is that I need a citation when I use the mentioned
integration in a paper but I searched in several integration table books and
http://functions.wolfram.com website but could not find anything for
citation. 
can any one, please, help me... 
-- 
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• Follow-Ups:
  • Re: Question about Integration and citation
    • From: Murray Eisenberg <murray@math.umass.edu>