Question: HELP PLEASE FOR QUESTION # 8 8. [-/10 Points] DETAILS SCALCET8 14.6.039. The second directional derivative of f(x, y) is DJ f(x, y) = Du[Duf(x,

HELP PLEASE FOR QUESTION # 8

8. [-/10 Points] DETAILS SCALCET8 14.6.039. The second directional derivative of f(x, y) is DJ f(x, y) = Du[Duf(x, y)]. If f ( x, y) = x3 + 5x2y + y3 and u = 5 12 13 13 calculate Du f(1, 2). Duff(1, 2) = 9. [-/10 Points] DETAILS SCALCET8 13 4 009

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