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Re: Dificulty on Integrate function!

  • To: mathgroup at smc.vnet.net
  • Subject: [mg96947] Re: Dificulty on Integrate function!
  • From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
  • Date: Sat, 28 Feb 2009 06:39:41 -0500 (EST)
  • Organization: Uni Leipzig
  • References: <go8i0t$l3u$1@smc.vnet.net>
  • Reply-to: kuska at informatik.uni-leipzig.de

Hi,

and if there exist no closed form of the integral ??
You should think about asymptotic techniques to approximate
the integral.

Regards
   Jens


negedea at googlemail.com wrote:
> Dear all,
> 
> I got a problem in integrating the expression (given below in input
> form) on Mathematica. Please give me some hints or a way around to get
> the solutions. . I want to integrate the equation  with respect to b,
> c, and d. So that I get an equation only in terms of t and a. I tried
> to use Integrate function in Mathematica both in the form of definite
> and indefinite integral but it could not turn out the result. If the
> indefinite integral is not working the ranges of integration for
> definite integral shall be the following {b, 0, 170}, {c, 0, 400} and
> {d, 0,170}.
> 
> (5.985857026794833*^-14*(14 + c)^2.37*E^(-0.0003630681026445808*
> (-50.29 + b)^2 - c/41 - 0.0003125*(-43.7 + d)^2 - b/d + t/d -
> 1.1985780806058064*^-6*(-3535.42 + c + ((a - c)*E^((-b + t)/d))/(t/b)^
> (b/d))^2))/(t/b)^(b/d)
> 
> Please please help me. If I could not get this solution I have to
> discard so many things I spent considerable time on!
> 
> Thanking you in advance.
> 
> Negede
> 


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