2016-05-11

[public] 166K views, 1.66K likes, 26.0 dislikes audio only

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Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/math/multivariable-calculus/multivariable-derivatives/gradient-and-directional-derivatives/v/directional-derivative-formal-definition

Learn the limit definition of a directional derivative. This helps to clarify what it is really doing.

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