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Please show your answers to at least 4 decimal places. Find the directional derivative of the function f(x, y) = In(x* + y ) at

Please show your answers to at least 4 decimal places. Find the directional derivative of the function f(x, y) = In(x* + y ) at the point ( - 3, 3) in the direction of the vector ( - 3, - 1)

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