Find the directional derivative of f at the given point in the direction indicated by the angle 0. f(x,y)=√xy, (1,3), 0 = π/6 1/2 (3+√/³) 4 b. 1/2 (3+√3) a. C. 1²/ ( √3+√³) d. 1/2 (3+√3) e. 14 (3-√3³)

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