Unit vector field and gradient

In summary, the student is trying to find the unit vector in the direction of \vec{F} at the point (1, 2, -2).
  • #36
well from what I know when I put the points at ρ = (x2 + y2 + z2)1/2 it gives me the same result so I am curious that they are the same
 
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  • #37
hmm... I guess it's not the same... can someone give me some guides...
 
  • #38
anyone?
 
  • #39
I've practically already given you the answer -EquinoX-. No on will be able to help you if you don't show a detailed attempt.
 

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