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    Directional derivative

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    Find the directional derivative of f at P in the direction of v; that is find D_u f(P), where u=v/{v}:
    f(x, y, z)= ln(1 + x^2 +y^2 - z^2) ; P(1, -1, 1), v=2i - 2j -3k

    © BrainMass Inc. brainmass.com March 4, 2021, 5:50 pm ad1c9bdddf
    https://brainmass.com/math/derivatives/directional-derivative-functions-13784

    Solution Preview

    The directional derivative is:
    D_u ...

    Solution Summary

    This shows how to find a directional derivative.

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