Question: Let f(x, y) = xely - year. Then Vf = and Duf(1, -1) in the direction of the vector (1, 1) is

Let f(x, y) = xely - year. Then Vf = and

Duf(1, -1) in the direction of the vector (1, 1) is

Let f(x, y) = xely - year. Then Vf = and Duf(1, -1) in the direction of the vector (1, 1) is

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