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8). a) Find an equation of the tangent plane to the surface z = x at...

8).

a) Find an equation of the tangent plane to the surface z = x at (−4, 2, −1).

b) Explain why f(x, y) = x2ey is differentiable at (1, 0). Then find the linearization L(x, y) of the function at that point.

Math   Calculus   
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