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Find the directional derivative Duf(P) of f(x, y) - xy2 at the point P(1, 2) in the direction 2 u V5' V5 OD.f (P) -

Find the directional derivative Duf(P) of f(x, y) - xy2 at the point P(1, 2) in the direction 2 u V5' V5 OD.f (P) - 12 O Duf (P) = 12 5/5 ONone of these O Duf(P) = 20 O Duf(P) = 675/5

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