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Shooting an arrow in the direction of the gradien

  1. Mar 26, 2009 #1
    If you are given a point (1,2,9), and a gradient <2,1,2>. How can you tell that if you show an arrow, it would hit the point (5,4,13). The arrow is being shot in the direction of the gradient.

    where f(x,y,z)= x^2+y^2/4+z^2/9
     
  2. jcsd
  3. Mar 26, 2009 #2

    HallsofIvy

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    What does f have to do with the motion of the arrow?
     
  4. Mar 26, 2009 #3
    I just included that to show how I calculated the gradient.
     
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