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Let f(x,y,z)=3x2+4y2+z2f ( x , y , z ) = 3 \sqrt { x ^ { 2 } + 4 y ^ { 2 } + z ^ { 2 } }

Question 254

Multiple Choice

Let f(x,y,z) =3x2+4y2+z2f ( x , y , z ) = 3 \sqrt { x ^ { 2 } + 4 y ^ { 2 } + z ^ { 2 } } . Find fz(2,1,1) f _ { z } ( 2,1,1 ) .


A) 0
B) 1
C) 12\frac { 1 } { 2 }
D) 3
E) 4
F) 1- 1
G) 12- \frac { 1 } { 2 }
H) 3- 3

Correct Answer:

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