Pint-Sized Portraits has 4 different backgrounds and 5 poses in which to photograph children. How many different pictures are th
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Answer:
Remember that the maximum rate of change of f at a point u is the length of the of the gradient vector evaluate in u, and the direction in which it occurs is in direction of the gradient vector evaluate in u.
The gradient vector of f is
Then, the maximum rate of change is in the direction of (5,8).