Answer: In Exercises 5156, find the point(s) on the surface at which the tangent plane
Chapter 13, Problem 56(choose chapter or problem)
In Exercises 51–56, find the point(s) on the surface at which the tangent plane is horizontal.
\(z=x y+\frac{1}{x}+\frac{1}{y}\)
Text Transcription:
z=xy+frac1x+frac1y
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