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The Gradient Of f(x,y,z)=x2+y2+z2f ( x , y , z ) = \sqrt { x ^ { 2 } + y ^ { 2 } + z ^ { 2 } }

Question 60

Multiple Choice

The gradient of f(x,y,z) =x2+y2+z2f ( x , y , z ) = \sqrt { x ^ { 2 } + y ^ { 2 } + z ^ { 2 } } at (3, 0, -4) is


A) 35i45k\frac { 3 } { 5 } \mathbf { i } - \frac { 4 } { 5 } \mathbf { k }
B) 35i+45k\frac { 3 } { 5 } \mathbf { i } + \frac { 4 } { 5 } \mathbf { k }
C) 35i45k- \frac { 3 } { 5 } \mathbf { i } - \frac { 4 } { 5 } \mathbf { k }
D) 35i+45k- \frac { 3 } { 5 } \mathbf { i } + \frac { 4 } { 5 } \mathbf { k }
E) 35i45j\frac { 3 } { 5 } \mathbf { i } - \frac { 4 } { 5 } \mathbf { j }

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