(hmm. wasnt to sure about where to post this)(adsbygoogle = window.adsbygoogle || []).push({});

im given an equation to a 3d surface and asked to find the gradient at a certain point, in the radial direction.

my question is, what is the radial direction?

[ the equation is f(x,y) = 3*(x^2)*y + 2*y if its needed ]

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# Directional derivative: radial direction

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