Answer
$a=1,d=0$ or $a=0,d=1$.
Work Step by Step
We know that for a triangular or diagonal matrix, the eigenvalues are the entries on the diagonal. Hence, we have:
$a=1,d=0$ or $a=0,d=1$.
Elementary Linear Algebra 7th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
1-13311-087-8
ISBN 13:
978-1-13311-087-3
Chapter 7 - Eigenvalues and Eigenvectors - 7.1 Eigenvalues and Eigenvectors - 7.1 Exercises - Page 352: 63
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