Answer
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Work Step by Step
A matrix contains many elements and $a_{ij}$ can be identified as an element in a matrix of the $i-th$ row and $j-th$ column.
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter 8 - Section 8.3 - Matrix Operations and Their Applications - Exercise Set - Page 919: 66
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