## Question

###### $11-17$ Find the directional derivative of the function at the given point in the direction of the vector $\mathbf{v}$ . $$f(x, y, z)=\sqrt{x y z}, \quad(3,2,6), \quad \mathbf{v}=\langle- 1,-2,2\rangle$$

$11-17$ Find the directional derivative of the function at the given point in the direction of the vector $\mathbf{v}$ . $$f(x, y, z)=\sqrt{x y z}, \quad(3,2,6), \quad \mathbf{v}=\langle- 1,-2,2\rangle$$

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