Non linear equations: howto?

[Dmitri A. Sergatskov]

On Sun, Oct 19, 2008 at 11:47 PM, Fabrice DELENTE <address@hidden> wrote:
>> > My problem is that I have the curve of f, and I'd like to find its 
>> > equation;
>> > I guessed that f is of the form (a*x+b)*exp(c*x+d)+e, and I'm trying to 
>> > find
>> > the right values for a,b,c,d and e.
>>
>
>> This is impossible to solve. E.g. d can be anything, so I suggest making
>> it 0.
>
> Well I tried on geogebra to find a solution visually, and it seems possible;
> why do you say it is impossible?
>

What I meant to say that there are infinite number of solutions.


a, b, and d are not independent parameters.
This is just like solving equation a*x + b + c.
Or in more obfuscate form
a*(x-x0) + b

> --
> Fabrice DELENTE

Dmitri.
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