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Find the derivative of the function at the given point in the direction of A. f(x, y) = tan-1 --4x (10,-2), A 12i-5j Find

Find the derivative of the function at the given point in the direction of A. f(x, y) = tan-1 --4x (10,-2), A 12i-5j Find the derivative of the function at the given point in the direction of A. f(x, y) = tan-1 --4x (10,-2), A 12i-5j

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