Let A be a diagonalisable 3 x 3 matrix with rational entries. Working over R on V = R³: (a) Is it possible that A has two distinct irrational eigenvalues and one rational one? (b) Is it possible that A has one irrational eigenvalue and two distinct rational ones? (c) Is it possible that A has three distinct rational eigenvalues? Select one: O Yes to (c) and No to (a), (b) Yes to all No to (a) and Yes to (b), (c) No to (b) and Yes to (a), (c) O None of the others apply

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter4: Eigenvalues And Eigenvectors
Section4.3: Eigenvalues And Eigenvectors Of N X N Matrices
Problem 41EQ
Question
Let A be a diagonalisable 3 x 3 matrix with rational entries. Working over R on V = R³:
(a) Is it possible that A has two distinct irrational eigenvalues and one rational one?
(b) Is it possible that A has one irrational eigenvalue and two distinct rational ones?
(c) Is it possible that A has three distinct rational eigenvalues?
Select one:
O Yes to (c) and No to (a), (b)
Yes to all
No to (a) and Yes to (b), (c)
No to (b) and Yes to (a), (c)
O None of the others apply
Transcribed Image Text:Let A be a diagonalisable 3 x 3 matrix with rational entries. Working over R on V = R³: (a) Is it possible that A has two distinct irrational eigenvalues and one rational one? (b) Is it possible that A has one irrational eigenvalue and two distinct rational ones? (c) Is it possible that A has three distinct rational eigenvalues? Select one: O Yes to (c) and No to (a), (b) Yes to all No to (a) and Yes to (b), (c) No to (b) and Yes to (a), (c) O None of the others apply
Expert Solution
steps

Step by step

Solved in 3 steps with 2 images

Blurred answer
Recommended textbooks for you
Linear Algebra: A Modern Introduction
Linear Algebra: A Modern Introduction
Algebra
ISBN:
9781285463247
Author:
David Poole
Publisher:
Cengage Learning
Algebra & Trigonometry with Analytic Geometry
Algebra & Trigonometry with Analytic Geometry
Algebra
ISBN:
9781133382119
Author:
Swokowski
Publisher:
Cengage
Elementary Linear Algebra (MindTap Course List)
Elementary Linear Algebra (MindTap Course List)
Algebra
ISBN:
9781305658004
Author:
Ron Larson
Publisher:
Cengage Learning