Given that the directional derivative of f at the point (9,-9, 4) in the direction of a = 4i-4j-7k is − 8 and that ||Vƒ (9, −9, 4)|| = 8, find Vƒ(9,-9, 4). Vƒ(9,-9, 4) =

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A: Let's find volume by using shell method.

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A: Dear student as per bartleby police we are allow to solve one doubt as a time. Please repost other…

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