Find the directional derivative of f(x, y) = (xy)^1/2
at P(6, 6) in the direction from P to Q(9, 2)
The directional derivative (D.D) of function f at point P in the direction of vector a is given by,
Here, the vector a is, vector in the direction from P(6,6) to Q(9,2).
Now, find the value of gradient of f at point P....
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