Most functions y=f(x) have tangent lines for any point x.(adsbygoogle = window.adsbygoogle || []).push({});

Does a function z=f(x,y) have a tangent plane for any point x,y?

And could you extend this to higher dimensions if necessary? (Tangent cubes? Tangent hypercubes?)

Edit: Sorry, I thought I was posting in the General Math forum. Movement would be helpful, please.

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# Tangent Planes

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