The quadratic form is positive-semidefinite but not positive definite negative-semidefinite but not negative definite indefinite negative definite 9A (x, y) = x² + 2xy + 3y² positive definite

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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The quadratic form
is
positive-semidefinite but not positive definite
negative-semidefinite but not negative definite
indefinite
qA (x, y) = x² + 2xy + 3y²
negative definite
positive definite
Transcribed Image Text:The quadratic form is positive-semidefinite but not positive definite negative-semidefinite but not negative definite indefinite qA (x, y) = x² + 2xy + 3y² negative definite positive definite
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