Elementary Linear Algebra 7th Edition

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

Chapter 1 - Systems of Linear Equations - Review Exercises - Page 35: 25

Answer

The matrix is in row-echelon form. But it is not in the reduced echelon form.

Work Step by Step

The matrix is $$ \left[\begin{array}{cccc}{1} & {0} & {1} & {1} \\ {0} & {1} & {2} & {1} \\ {0} & {0} & {0} & {1}\end{array}\right] $$ in row-echelon form. But it is not in the reduced echelon form.
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