Function of two variables

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Reference no: EM131662404

Let f be a function of two variables that has continuous partial derivatives and consider the points 

A (4, 9),

B (7, 9),

C (4, 13), and D(16, 18).

The directional derivative of f at A in the direction of the vector AB is 8 and the directional derivative at A in the direction of AC is 14. Find the directional derivative of f at A in the direction of the vector AD. (Round your answer to two decimal places.)

Reference no: EM131662404

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