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Complete the following question on your own paper. Answers without work will not receive credit. There is no need to type anything inthe box on this question.Complete parts (a) and (b) with f(x, y) = xy + xy.(a) Find Vf.(b) Find the directional derivative of f at the point (-2, 1) in the direction of u = (-2, 3). Leave your answer in exact form (do not givea rounded answer from a calculator).
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