Question: 4. (a) Find the unit vector in the direction in which the maximum value of the directional derivatives occurs for the function f(x, y)

4. (a) Find the unit vector in the direction in which the

4. (a) Find the unit vector in the direction in which the maximum value of the directional derivatives occurs for the function f(x, y) = x 3xy + 4y? at p = (-2,0).

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