## A question about fsolve...

Asked by:

Hello!

I have a function, say f(x,y), and I want to solve for x for a range of values of y. The function is complicated, and thus, I gather I need to use fsolve to find the set of solutions numerically. I know how to use fsolve to find x for a given (single) value of y, but I have never used it to generate a list of x values given a range of y values. Then, I would l like to plot x as function of y, but I will leave that for later.

Thank you!

## How can I use the values derived by fsolve in furt...

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I have been using fsolve to derive constants for a polynomial. These are presented clearly in blue, but I am unable to reference these numbers for further calculations other than by typing them in manually. e.g. output is:

{d = 520.9032305, c = .41478630e-1, b = -.84548378e-5, a = .125070852e-8}

fsolve({y[1]=a*x[1]^3+b*x[1]^2+c*x[1]+d,y[2]=a*x[2]^3+b*x[2]^2+c*x[2]+d,
> y[3]=a*x[3]^3+b*x[3]^2+c*x[3]+d,y[4]=a*x[4]^3+b*x[4]^2+c*x[4]+d},{a,b,c,d});

## maple 6 download...

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can anyone one help me to download maple 6 ?

## Plotting complex roots of a polynomial...

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I've used fsolve in Maple 6 to find the roots (real and complex) of a polynomial.  I'd like to create a plot showing the location of those roots in the complex plane.  How can I do this?

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