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Q5. (10 pts) For A = 2yex i + j and B = 3yex i+ In (xy)j, show that: a (A . B) aB OA

Q5. (10 pts) For A = 2yex i + j and B = 3yex i+ In (xy)j, show that: a (A . B) aB OA = A . B Ox ax ax Hint: A . B is a scalar, A, B are vectors. dA dAx it day The vector derivative for A = Axi + Ayj : dx dx dx

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