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MathGroup Archive 2003

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Re: Help to solve numerical equation

  • To: mathgroup at smc.vnet.net
  • Subject: [mg43739] Re: Help to solve numerical equation
  • From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
  • Date: Thu, 2 Oct 2003 02:52:11 -0400 (EDT)
  • Organization: Universitaet Leipzig
  • References: <blcqh2$p75$1@smc.vnet.net>
  • Reply-to: kuska at informatik.uni-leipzig.de
  • Sender: owner-wri-mathgroup at wolfram.com

Hi,


FindRoot[Evaluate[eq == 0 /. n_Real :> Rationalize[n]], {x, 0.1}, 
  MaxIterations -> 128]

Regards
  Jens

Raul Gomez Riera wrote:
> 
> I want to solve the equation below:
> 
> eq = 0.5*Exp[x*200] + 0.21*Exp[x*500] + 0.1*Exp[x*110] +
>     0.07*Exp[x*(15)] + 0.018*Exp[x*(-16)] + 0.002*Exp[x*(-263)] - 1
> 
> and I am try whith:
> 
> NSolve[eq == 0, x ]
> 
> but Mathematica don't get any result. We have Mathematica 4.0 on linux.
> 
> Can any body help  me.
> 
> Thanks
> 
> Raul


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