I am trying to draw the contour plot of the following function:(adsbygoogle = window.adsbygoogle || []).push({});

[tex] f(x,y) = \frac {a(x+y)} {x^2 + y^2 + a^2} [/tex]

by setting h(x,y) = 1 and completing the square I recieved the following:

[tex] (x-(a/2))^2 - (y-a/2)^2 = a^2 [/tex]

surely, this is not a circle, and not a ellipse...but what is it then.

Also, is there a possibility to draw contour plots rather fast (e.g. with Mathcad)?

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# Rally easy question (but I still need help)

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