In the matrix A, b is a constant. Consider: A = 2 -1 b -1 2 -1 b -1 2   a) Compute the determinants of the leading principal submatrices of A.    b) Utilizing the determinate values from part (a) to find for what b values the matrix A is positive definite.

College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter6: Matrices And Determinants
Section: Chapter Questions
Problem 11CC
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In the matrix A, b is a constant. Consider:

A =

2 -1 b
-1 2 -1
b -1 2

 

a) Compute the determinants of the leading principal submatrices of A. 

 

b) Utilizing the determinate values from part (a) to find for what b values the matrix A is positive definite.

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