Answer the following questions and justify your answers. (a) Let A be a 3 x 3 matrix with two distinct eigenvalues. Each eigenspace is one-dimensional. Is A diagonalizable? Explain why. (b) Let A be a 4 x 4 matrix with three distinct eigenvalues. One eigenspace is one-dimensional, and one of the other eigenspaces is two-dimensional. Is it possible that A is not diagonalizable? Justify your answer.

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter4: Eigenvalues And Eigenvectors
Section4.5: Iterative Methods For Computing Eigenvalues
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Please answer and show all your work.
2. Answer the following questions and justify your answers.
(a) Let A be a 3 x 3 matrix with two distinct eigenvalues. Each eigenspace is one-dimensional. Is A
diagonalizable? Explain why.
(b) Let A be a 4 x 4 matrix with three distinct eigenvalues. One eigenspace is one-dimensional, and one
of the other eigenspaces is two-dimensional. Is it possible that A is not diagonalizable? Justify your
answer.
1
3. Diagonalize the matrix B =
-2
-1
-4
All computations must be shown (eigenvalues, bases for
eigenspaces, checking of BP = PD).
Transcribed Image Text:2. Answer the following questions and justify your answers. (a) Let A be a 3 x 3 matrix with two distinct eigenvalues. Each eigenspace is one-dimensional. Is A diagonalizable? Explain why. (b) Let A be a 4 x 4 matrix with three distinct eigenvalues. One eigenspace is one-dimensional, and one of the other eigenspaces is two-dimensional. Is it possible that A is not diagonalizable? Justify your answer. 1 3. Diagonalize the matrix B = -2 -1 -4 All computations must be shown (eigenvalues, bases for eigenspaces, checking of BP = PD).
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