Answer
$\left[\begin{array}{rrr}
-2/15 & 1/3 & 1/15\\
2/3 & -2/3 & -1/3\\
-1/3 & 1/3 & -1/3
\end{array}\right]$
Work Step by Step
Work done with the online matrix calculator at
desmos.com/matrix
Precalculus: Mathematics for Calculus, 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305071751
ISBN 13:
978-1-30507-175-9
Chapter 10 - Section 10.5 - Inverses of Matrices and Matrix Questions - 10.5 Exercises - Page 732: 28
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