8. Consider the function f(r, y) = 4+6x² +3y². which is differentiable in an environment D from the point P (-4, -1). The value of the directional derivative of f at P in the direction of the vector u = (-5, -4) corresponds to 216 A) 41 264 B) 41 216 V41 264 D) 41

Calculus: Early Transcendentals
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Author:James Stewart
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Chapter1: Functions And Models
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Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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8. Consider the function f(r,y) = 4+6x² +3y²,
which is differentiable in an environment D from the point P (-4, -1).
The value of the directional derivative of f at P in the direction of the
vector u = (-5, -4) corresponds to
216
A)
41
264
B)
V41
216
C)
V41
264
D)
41
Transcribed Image Text:8. Consider the function f(r,y) = 4+6x² +3y², which is differentiable in an environment D from the point P (-4, -1). The value of the directional derivative of f at P in the direction of the vector u = (-5, -4) corresponds to 216 A) 41 264 B) V41 216 C) V41 264 D) 41
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