10. Let f(x, y) = x³ + 12y? + 12.xy be defined on the rectangle D, given as the bounded domain –1

Algebra & Trigonometry with Analytic Geometry
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ISBN:9781133382119
Author:Swokowski
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Chapter9: Systems Of Equations And Inequalities
Section: Chapter Questions
Problem 12T
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10. Let f(x, y) = x³ + 12y? + 12xy be defined on the rectangle D, given as the bounded
domain –1< x < 3, –3 < y < 3.
(a) Find the critical point(s) of f, and determine their nature.
(b) Find the extremal values of f on the boundary of D.
(c) Hence write down the maximum and minimum values of f on D and their
coordinates.
Transcribed Image Text:10. Let f(x, y) = x³ + 12y? + 12xy be defined on the rectangle D, given as the bounded domain –1< x < 3, –3 < y < 3. (a) Find the critical point(s) of f, and determine their nature. (b) Find the extremal values of f on the boundary of D. (c) Hence write down the maximum and minimum values of f on D and their coordinates.
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