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Math Help - directional derivatives

  1. #1
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    directional derivatives

    I'm trying to find the directional derivative of the function:
    f(x,y,z)=x^3-xy^2-z<br />
    at the point P_0(1,1,0)

    Any help would be appreciated. Thanks!
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  2. #2
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    Quote Originally Posted by btgebo View Post
    I'm trying to find the directional derivative of the function:
    f(x,y,z)=x^3-xy^2-z<br />
    at the point P_0(1,1,0)

    Any help would be appreciated. Thanks!
    Do you know the formula for calculating a directional derivative? Please quote it from your textbook or class notes.
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  3. #3
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    Also, you need a direction in which to find the directional derivative.
    The direction needs to be a unit vector.
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  4. #4
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    thanks for the help guys. turns out the paper with the problem didn't have the (necessary) vector equation on it.

    I figured it out once i got all the information
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