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I can't draw a part of a circle

I can't draw a part of a circle

I can't draw a part of a circle

I am trying to draw a part of a circle using this function

f(x):= 9x(5-4x)(11-4x)/2(2-x)^2

I have tried both x-y plot and polar plot but when I place f(x) in the y-axis I always get the same error message(illegal function value).

Any ideas how to fix that?

Thank you very much.

RE: I can't draw a part of a circle

You need to define an array variable, say i:=0..100, then vector of x's, then put x[i on the x axis and f(x[i) on the y axis.

RE: I can't draw a part of a circle

>  You have what appears to be a line with a notch in it.

>  Assuming that your equation will be fixed, you cannot use a single equation to describe a circle, since negative values of y require a separate equation.


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