Question: calculus 3 Let f(x, y) = and let P be the point (2, - 1). 2x + y 1. V.f (P ) = [ Select

 calculus 3 Let f(x, y) = and let P be the

calculus 3

point (2, - 1). 2x + y 1. V.f (P ) =

Let f(x, y) = and let P be the point (2, - 1). 2x + y 1. V.f (P ) = [ Select ] 2. Find the directional derivative of f at P in the direction . [ Select ] 3. Find a direction so that f does not change at P. [ Select ]

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