Re: how to solve integral equation

*To*: mathgroup at smc.vnet.net*Subject*: [mg55488] Re: [mg55478] how to solve integral equation*From*: "Janos D. Pinter" <jdpinter at hfx.eastlink.ca>*Date*: Sat, 26 Mar 2005 02:39:19 -0500 (EST)*References*: <200503251048.FAA11339@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Matt, you can use e.g. NMinimize. Example: NMinimize[{0, N[fcn[10., b1, 5.]] == 1}, {b1}] returns {0., {b1 -> -0.052110648972416615}} Regards, Janos D. Pinter PCS Inc. E-mail: jdpinter at hfx.eastlink.ca Web: www.pinterconsulting.com At 06:48 AM 3/25/2005, you wrote: >I have a function > >fcn[x_,b1_,b2_]:= Integrate[Exp[-(b1 x1^3 + b2 x1)],{x1,0,x}] > >For a given large x, and a given b2, I need to solve > >fcn[xlarge,b1,b2given]==1 > >for b1. > >Any help would be greatly appreciated. > >Matt > > > >-- >No virus found in this incoming message. >Checked by AVG Anti-Virus. >Version: 7.0.308 / Virus Database: 266.8.1 - Release Date: 3/23/2005 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.308 / Virus Database: 266.8.1 - Release Date: 3/23/2005

**References**:**how to solve integral equation***From:*mss4@duke.edu