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4. Find the directional derivative of the function f(x, y) = In(x* + y ) at the point (2, - 2) in the direction of

Find the directional derivative of the function f(x, y) = In(x* + y ) at the point (2, - 2) in the direction of the vector ( - 3, - 1). Answer exactly or round to 2 decimal places. Preview

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