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Sketch g(D) from the description of D and change of variables  (x, y) = g(u, v). x = 3u, y =v where D is the rectangle 0 ≤ u ≤ 2, 1 ≤ v ≤ 4

Which is NOT a main argument of the article?

According to Ojha, we should not let Barbie’s flaws deter us from finding her constructive lessons.

Find the value.If , find

Find the linearization of the function at the given point.

Solve the problem.Evaluate  at t = 3π for the function w(x, y) = x2 – y2 – 9x; x = cost, y = sin t.

Find  by using the Chain Rule. Express your final answer in terms of t.

Describe the domain of the function of three variables.

Solve the problem.Find the equation for the tangent plane to the surface  x2 + 8xyz + y2 = -6z2  at the point (-1, -1, -1).

Solve the problem.Find the derivative of the function at the point (9, -9, 9) in the direction in which the function increases most rapidly.