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Problem with graphics


Dear people,

I have found the following problem. I have ploted

f[x_, y_] := Sqrt[(x^2 + y^2)^3]

with Plot3D in order to see how it looks. Then I ploted f[x, 0] (which
is x^3) between -1 and 1 and I got a symmetric plot. It seems that
Mathematica plot the function Sqrt[x^6] or (x^2)^(3/2) and evaluate
first the symmetric term (x^6 or x^2)...
Does anyone knows what it happens and how can it be fixed?

Thanks in advance!

Lautaro Vergara






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