(5 points) Let f(x, y) = cos(3 xy) + 2 xy² + y + z. Then the directional derivative of fin the direction of v = (0, -2)

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5 Points Let F X Y Cos 3 Xy 2 Xy Y Z Then The Directional Derivative Of Fin The Direction Of V 0 2 1 (22.05 KiB) Viewed 41 times

(5 points) Let f(x, y) = cos(3 xy) + 2 xy² + y + z. Then the directional derivative of fin the direction of v = (0, -2) is Duf=? O 3 x sin(3 ry)-4 xy - 1 O-3x sin(3 xy)+2 y²+1 O 3x sin(3 ay)-4 xy None of the others 3 x sin(3 ry)+2 xy