Use the contour map of f (x, y) in Figure 9 to explain the following statements: (a) fy
Chapter 14, Problem 53(choose chapter or problem)
Use the contour map of f (x, y) in Figure 9 to explain the following statements: (a) fy is larger at P than at Q, and fx is smaller (more negative) at P than at Q. (b) fx (x, y) is decreasing as a function of y; that is, for any fixed value x = a, fx (a, y) is decreasing in y.
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