Question

Question here on partial derivatives/vectors.
Attachment to follow.

Answer 1

diffrentiate an equation thrice

Answer 2

want to expand on that?

Answer 3

@soty2013

Answer 4

simply differentate it...

Answer 5

I already have delta F at (1,2,3) = <3,3,2>
I am stuck on how to change the theta of -pi/4 into a unit vector of which I can use for the dot product.

Answer 6

I don't think you understand the scope of the question haha, no offense.

Answer 7

yes you differentiate the f(x,y,z) which I did. Then found the vector delta F at point (1,2,3) which is <3,3,2>
However I am stuck on finding the unit vector from theta.

Answer 8

@soty2013

Answer 9

now solve it by position vector and it will be the answer

Answer 10

got an example?