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(Solved): Find all directions (as unit vectors) in which the rate of change of f(x,y)=13x2xy at the poi ...
Find all directions (as unit vectors) in which the rate of change of f(x,y)=1−3x2−xy at the point (−1,1) is zero. A) u=∓101±103 B) u=∓261l±265j C) u=∓132±133 D) u=∓292±295 E) u=∓345±343J