Directional Derivative
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Find the directional derivative of f(x,y) = 2x^3-y^2+xy at the point (1,2) in the direction of the vector
(1,3). Be careful: That direction vector isn't a unit vector!
https://brainmass.com/math/derivatives/directional-derivative-18496
Solution Summary
Gradients are used to find a directional vector. The solution is well presented.
$2.49