Solved Find the directional derivative of the function \[ | Chegg.com
Directional Derivative Calculator + Online Solver With Free Steps
Calc III: Max value and direction of directional derivative - YouTube
multivariable calculus - Calculate the Directional Derivative of $f (x, y, z) = x z + \sin (x z + y)$ at $[−4,−2,−2]$ in the direction of the vector $[3, −3, −2]$ - Mathematics Stack Exchange