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 Author Comment/Response Michael 02/22/05 05:48am Hello, I've got a very stupid problem with the Solve function: I'm trying to extract the parameter F from the following expression: \!\(\* RowBox[{ StyleBox[ RowBox[{ StyleBox["d", FontFamily->"Symbol"], StyleBox["b", FontFamily->"Courier New "]}]], "=", \(\((\((1.3333333333333333`*^-14\ F\ \(( 2.1715831307718796`*^-6 + T)\)\ \((\(\(0.000054999102015670725`\)\(\[InvisibleSpace]\)\) + T)\)\ \((2.7018841608770822`*^-8 + \((\(-0.00009467847152918785`\ \) + T)\)\ T)\)\ \((3.025049389944464`*^-9 + T\ \ \((\(\(0.00011000089798432814`\)\(\[InvisibleSpace]\)\) + T)\))\)\ \ \((1.4177997261049472`*^-8 + T\ \((\(\(0.00022313188839841693`\)\(\ \[InvisibleSpace]\)\) + T)\))\))\)/\((\((\(\(0.000055`\)\(\[InvisibleSpace]\)\ \) + 1.`\ T)\)\^3\ \((5.4165196301728004`*^-8 + T\ \ \((\(\(0.00006000896985039874`\)\(\[InvisibleSpace]\)\) + T)\))\)\^2)\) - \ \(1.5675000000000003`*^-14\ T\ \((\(\(0.00001545579367477958`\)\(\[InvisibleSpace]\)\) + T)\)\ \((\(\(0.00014453523647482168`\)\(\ \[InvisibleSpace]\)\) + T)\)\ \((\(\(0.0002`\)\(\[InvisibleSpace]\)\) + T)\)\ V\)\/\(5.416519630172801`*^-8 + T\ \ \((\(\(0.0000600089698503988`\)\(\[InvisibleSpace]\)\) + \ T)\)\))\)/\((\((\(\(0.000015455793674779585`\)\(\[InvisibleSpace]\)\) + \ T)\)\^2\ \((\(\(0.00014453523647482166`\)\(\[InvisibleSpace]\)\) + T)\)\^2)\)\ \)}]\) Ok I don't know if it is very clear but the expression is of the type db=a(T,V)*F+b(T,V) so it should not be a problem to express F in function of a,d and b. But when I use the command "Solve[db == Z, F]" I got an empty list as a result!!! (Z has no value) URL: ,
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