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OpenStudy (anonymous):
how do I sketch the graph of f(x,y) = 4 + 2x^2 + 2y^2. (NB 2x^2 is 2x squared)
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OpenStudy (anonymous):
z=4+2x^2+2y^2, you have to find the, the traces, z=0, x=0 and y=0. Also find when z=k
OpenStudy (anonymous):
where k is a constant
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