Mathematics Homework Solutions
Problem
#13784

Directional derivative


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


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This shows how to find a directional derivative.

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