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I face the following problem.

I need to find the best values of the parameters [itex]a,b,c[/itex]

of the complex function [itex]f(x)=a+\frac{b-a}{1+j x c}[/itex] of the real

variable [itex]x[/itex] where ([itex]j^2=-1[/itex])

such that

[itex]f(2 \pi 10^6)=2.33-j 1.165 10^{-3}[/itex] and

[itex]f(2 \pi 10^{10})=2.347-j 3.7552 10^{-3}[/itex].

It seems to be a curve fitting problem but the function [itex]f(x)[/itex] is complex!

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# Curve Fitting

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