Answer
Invertible
Work Step by Step
$det(A)=6 · 4 · 1 + 0 = 24$
The determinant is not 0, so A is invertible.
Linear Algebra and Its Applications (5th Edition)
by Lay, David C.; Lay, Steven R.; McDonald, Judi J.
Published by
Pearson
ISBN 10:
032198238X
ISBN 13:
978-0-32198-238-4
Chapter 6 - Orthogonality and Least Squares - 6.1 Exercises - Page 338: 6
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