Problem: is not a list of numbers with dimensions

*To*: mathgroup at smc.vnet.net*Subject*: [mg88450] Problem: is not a list of numbers with dimensions*From*: "Fikri Serdar GOKHAN" <fsgokhan at gmail.com>*Date*: Mon, 5 May 2008 06:16:59 -0400 (EDT)

When run the below code, A=1*10^(-4); k=2/3; g=1.12*10^(-11); Attenuation= 0.23026*0.475*10^(-3); L=7200; Leff=(1-exp[-Attenuation*L])/Attenuation; FindRoot[x-A*exp[k*g*x*Leff-Attenuation*L],{x,0}] It executes the below solution, FindRoot::nlnum: The function value {0.-0.0001 exp[-0.787489+0. \ (1.+Times[<<2>>])]} is not a list of numbers with dimensions {1} at \ {x} = {0.}. I need your help about numerical and Alpha_numeric solution of this problem. f(x)= x-A*exp[k*g*x*Leff-Attenuation*L Serdar

**Follow-Ups**:**Re: Problem: is not a list of numbers with dimensions***From:*"W_Craig Carter" <ccarter@mit.edu>