Question: Let f(x, y) = -x2 + 2y. (a) Find the unit vector whose direction is of greatest increase in f at the point (-1, 2).

Let f(x, y) = -x2 + 2y. (a) Find the unit

Let f(x, y) = -x2 + 2y. (a) Find the unit vector whose direction is of greatest increase in f at the point (-1, 2). (b) Find a unit vector w where the directional derivative D f- is equal to 0 at point (-1, 2)

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