This Calculus 3 video gives an introduction to directional derivatives and explains how to calculate a directional derivative. We show you how level curves and the gradient give us a start to understanding the directional derivative at a point in the direction of a vector, and we explain the formula for a directional derivative. We then work three difference examples of finding the directional derivative at a point in a particular direction, with the last example using a function of three variables.
0:00 Level curves, gradients and directional derivatives
3:14 Example 1 - Directional derivative (2 variables)
7:29 Example 2 - Directional derivative (2 variables)
11:13 Example 3 - Directional derivative (3 variables)
Houston Math Prep Calculus 3 Playlist: [ Ссылка ]

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