Elementary Linear Algebra 7th Edition

Published by Cengage Learning
ISBN 10: 1-13311-087-8
ISBN 13: 978-1-13311-087-3

Chapter 2 - Matrices - 2.2 Properties of Matrix Operations - 2.2 Exercises - Page 61: 59

Answer

See proof below.

Work Step by Step

We know that $1* A=1* [a_{ij}]=[1*a_{ij}]$ Since $a_{ij}]$ is a real number and $1$ is the identity number, then $1* A=1* [a_{ij}]=[1*a_{ij}]=[a_{ij}]=A$
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