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Re: How to solve this type of equation in Mathematica?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg59894] Re: How to solve this type of equation in Mathematica?
  • From: "Jens-Peer Kuska" <kuska at informatik.uni-leipzig.de>
  • Date: Thu, 25 Aug 2005 06:33:29 -0400 (EDT)
  • Organization: Uni Leipzig
  • References: <dehk3h$c9t$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Hi,

eqn = Equal[Integrate[Times[Plus[P, x], f[x]], 
List[x, P,
DirectedInfinity[1]]], 1]

D[#, P, P] & /@ eqn

DSolve[%,f,P]

will show you that there exist no convergent 
solution.

Regards

  Jens

<poster at giganews.com> schrieb im Newsbeitrag 
news:dehk3h$c9t$1 at smc.vnet.net...
|
| Hi, I would like to be able to solve the 
equation:
|
| Equal[Integrate[Times[Plus[P, x], f[x]], List[x, 
P,
| DirectedInfinity[1]]], 1]
|
| in Mathematica.  Is there any way to do this?
|
| That is I would like to solve for f(x) when we 
know that
| integrating  (x + P) f(x) from P to Infinity 
over x equals 1.
| 



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