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MathGroup Archive 2011

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FindRoot with Logarithmic terms

  • To: mathgroup at smc.vnet.net
  • Subject: [mg115995] FindRoot with Logarithmic terms
  • From: skunkwerk <skunkwerk at gmail.com>
  • Date: Fri, 28 Jan 2011 06:16:29 -0500 (EST)
  • Reply-to: comp.soft-sys.math.mathematica at googlegroups.com

Hi,
  I'm trying to find the roots of a logarithmic equation that I've plotted successfully (I can see both roots are between 0 and 1).

expr = 7500*x*(1 - x) + 325*8.314*(x*Log[x] + (1 - x)*Log[(1 - x)])
FindRoot[expr == 0, {x, 0, 1}]

FindRoot:nlnum: the function value(indeterminate) is not a list of numbers with dimensions {1} at {x} = {0.}

any ideas?

thanks


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