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Homework Help: Determining the Directional Derivative

  1. Oct 4, 2008 #1
    [SOLVED]Determining the Directional Derivative

    1. The problem statement, all variables and given/known data

    Find the following directional derivative of the following function in the direction of the given vector v

    [tex]f(x,y) = x^5 y^3 + 8 \\\ v = (-4,3)[/tex]

    2. Relevant equations

    [tex]\nabla_u f\left(x,y,z\right) = \frac{1}{\left|\bold{u}\right|}\left(\frac{\partial f}{\partial x}u_x + \frac{\partial f}{\partial y}u_y + \frac{\partial f}{\partial z}u_z\right)[/tex]

    3. The attempt at a solution

    EDIT: nevermind, got it.
    Last edited: Oct 4, 2008
  2. jcsd
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