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(Solved): Find the directional directive of f(x,y,z) at point P and in the direction of u.
f(x,y,z)=ln(x^(2)+4 ...
Find the directional directive of f(x,y,z) at point P and in the direction of u.
f(x,y,z)=ln(x^(2)+4y^(2)+5z^(2)),P(3,1,5),u=(-3)/(13)i-(4)/(13)j-(12)/(13)k
