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MathGroup Archive 1996

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Solving a numerical integration

  • To: mathgroup at smc.vnet.net
  • Subject: [mg5440] Solving a numerical integration
  • From: llosas <pere.llosas at imt.dmt.epfl.ch>
  • Date: Sat, 7 Dec 1996 00:26:15 -0500
  • Organization: epfl
  • Sender: owner-wri-mathgroup at wolfram.com

I would like to solve an equation of this kind


NIntegrate[f[n],{n,0,x}]==0    (f[x_]=Sqrt[1+x+x^2...)

where x is the searched value, and f cannot be integrated analytically.

NSolve[NIntegrate[f[n],{n,0,x}]==0,x], tries to evaluate
NIntegrate[f[n],{n,0,x}] before assignin a numerical value to x and
returns an error.

How could this calculation be done without having to write a program
that searches the root?

Thanks.

Pere


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