The plane z 2x y 1 is tangent to the graph of z (x, y) at P (5, 3) (a) Determine (5, 3), x (5, 3), and y (5, 3) (b) Approximate (5 2, 2 9)

Question: The plane z = 2x y 1 is tangent to the graph of z = (x, y) at P = (5, 3). (a)

The plane z = 2x − y − 1 is tangent to the graph of z = ƒ(x, y) at P = (5, 3).
(a) Determine ƒ(5, 3), ƒ_x(5, 3), and ƒ_y(5, 3).
(b) Approximate ƒ(5.2, 2.9).

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