Chapter 13: Problem 34
Find an equation of the plane parallel to the plane \(Q\) passing through the point \(P_{0}\). $$Q: x-5 y-2 z=1 ; P_{0}(1,2,0)$$
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Chapter 13: Problem 34
Find an equation of the plane parallel to the plane \(Q\) passing through the point \(P_{0}\). $$Q: x-5 y-2 z=1 ; P_{0}(1,2,0)$$
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Use the formal definition of a limit to prove that $$\lim _{(x, y) \rightarrow(a, b)}(f(x, y)+g(x, y))=\lim _{(x, y) \rightarrow(a, b)} f(x, y)+$$ $$\lim _{(x, y) \rightarrow(a, b)} g(x, y)$$
Consider the following equations of quadric surfaces. a. Find the intercepts with the three coordinate axes, when they exist. b. Find the equations of the \(x y-, x z^{-}\), and \(y z\) -traces, when they exist. c. Sketch a graph of the surface. $$1-4 x^{2}+y^{2}+\frac{z^{2}}{2}=0$$
a. Consider the function \(w=f(x, y, z)\). List all possible second partial derivatives that could be computed. b. Let \(f(x, y, z)=x^{2} y+2 x z^{2}-3 y^{2} z\) and determine which second partial derivatives are equal. c. How many second partial derivatives does \(p=g(w, x, y, z)\) have?
The domain of $$f(x, y)=e^{-1 /\left(x^{2}+y^{2}\right)}$$ excludes \((0,0) .\) How should \(f\) be defined at (0,0) to make it continuous there?
Use the gradient rules of Exercise 81 to find the gradient of the following functions. $$f(x, y, z)=(x+y+z) e^{x y z}$$
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