Question

Find the directional derivative of f(x, y) = (xy)^1/2

at P(6, 6) in the direction from *P* to Q(9, 2)

Step 1

The directional derivative (D.D) of function ** f **at point

Step 2

Here, the vector ** a** is, vector in the direction from

Step 3

Now, find the value of gradient of ** f** at point

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