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(i) Find the directional derivative of the function f(x, y) = xy at the point ( - 3, 4) in the direction v = i

(i) Find the directional derivative of the function f(x, y) = xy at the point ( - 3, 4) in the direction v = i - 2j. ii). What is the maximum rate of change of f(x, y) = x y at the point ( - 3, 4)

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