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Math Help - Directional derivative

  1. #1
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    Directional derivative

    Hey.
    I need to find the Directional derivative of the function u, in the direction l, in the point m (all in the pic).
    I'm not sure I did it right, can you please give me the ok?
    Attached Thumbnails Attached Thumbnails Directional derivative-scan0001.jpg  
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by asi123 View Post
    Hey.
    I need to find the Directional derivative of the function u, in the direction l, in the point m (all in the pic).
    I'm not sure I did it right, can you please give me the ok?
    Assuming the simple arithmetic is right, then this is OK.

    RonL
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