The directional derivative of f(x, y, z) = xyz at point (-1, 1, 3) in – McqOptions

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1.	The directional derivative of f(x, y, z) = xyz at point (-1, 1, 3) in the direction of vector î - 2ĵ + 2k̂ is
A.	3î - 3ĵ - k̂
B.	\( - \frac{7}{3}\)
C.	7/3
D.	7
Answer» D. 7

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