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Old   February 26, 2009, 09:44
Default Integration
  #1
John Haynes
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Can someone help me with the integration of this function with respect to x. Integral of [(e^(Xt))/((b+x)^(a+1))]. the limits of integration is zero to infinity. I couldn't use the integral sign using this messaging tool so if anyone try to help me, the integral sign should be included in the problem.
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Old   February 26, 2009, 11:37
Default Re: Integration
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Ahmed
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integrate((e^(xt))/((b+x)^(a+1)), x, 0, inf); Is a+1 positive, negative or zero? Question returned by maxima?

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Old   February 26, 2009, 11:46
Default Re: Integration
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Markus Lummer
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Try

http://integrals.wolfram.com/
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Old   February 26, 2009, 13:07
Default Re: Integration
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John Haynes
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I have just realised that the integration should not consist of the exponent term as I was trying to obtain the moment generating fucntion of a pdf. My main integrattion question is to obtain the integral of [(x^r)/(b+x)^(a+1)] in the limits of zero to infinity where a and b are constants.
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Old   February 26, 2009, 13:27
Default Re: Integration
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Ahmed
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I guess you can download maxima (free and open source) http://wxmaxima.sourceforge.net/

(%i1) integrate((x^r)/(b+x)^(a+1), x, 0, inf); Is r+1 positive, negative, or zero?

Good Luck
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Old   April 13, 2009, 00:41
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Leining D
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You can try to use Maple which is a powerful mathematic software to integrate the function.
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