Re: Help to solve numerical equation
- To: mathgroup at smc.vnet.net
- Subject: [mg43753] Re: Help to solve numerical equation
- From: poujadej at yahoo.fr (Jean-Claude Poujade)
- Date: Fri, 3 Oct 2003 02:28:42 -0400 (EDT)
- References: <blcqh2$p75$1@smc.vnet.net> <blgiif$feh$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
bobhanlon at aol.com (Bob Hanlon) wrote in message news:<blgiif$feh$1 at smc.vnet.net>...
> NSolve is used primarily with polynomial equations. Use FindRoot.
>
> 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;
>
> FindRoot[eq==0,{x,.0004}]
>
> {x -> 0.00042907}
>
>
> Bob Hanlon
Right! But FindRoot doesn't "see" there's another root...
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jcp