Haw.y If the directionl derivative Valne ( Du f) of the function flx,4) = x-3xy +uy 4t Paint (-2,0) în direction a unit vectur (u=Ai+Bjis paint (3,2) in the Same direction is 26. Vector (u) then find Value of the diYectional derivative (Duf) in the direction of the unit Vector (u) af the Peint X of 2 and its Vatue at find the unit

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