9. Locate all relative maxima, relative minima, and saddle points of the fol- lowing function f(x, y) = x² + y² - x²y. The second partial derivative test is: D(x, y) = fez(x, y) fyy (x, y) - (fxy(x, y))². •If D(xo, yo) > 0, and - if fax (xo, yo) > 0, then f has a relative (local) minimal at (xo, yo); then f has a relative (local) maximal at (xo, yo); if frx (xo, yo) <0, If D(xo, yo) <0, then (xo, yo) is a saddle point; • If D(xo, yo) = 0, no conclusion about (xo, yo).
9. Locate all relative maxima, relative minima, and saddle points of the fol- lowing function f(x, y) = x² + y² - x²y. The second partial derivative test is: D(x, y) = fez(x, y) fyy (x, y) - (fxy(x, y))². •If D(xo, yo) > 0, and - if fax (xo, yo) > 0, then f has a relative (local) minimal at (xo, yo); then f has a relative (local) maximal at (xo, yo); if frx (xo, yo) <0, If D(xo, yo) <0, then (xo, yo) is a saddle point; • If D(xo, yo) = 0, no conclusion about (xo, yo).
Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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