Elementary Linear Algebra 7th Edition

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

Chapter 4 - Vector Spaces - Review Exercises - Page 221: 3

Answer

(a) \begin{align*} (3,1,4,4). \end{align*} (b) \begin{align*} (0,4,4,2). \end{align*} (c) \begin{align*} (3,-3,0,2). \end{align*} (d) \begin{align*} (9,-7,2,7). \end{align*}

Work Step by Step

Consider the vectors ${u}=(3,-1,2,3), \quad {v}=(0,2,2,1)$ (a) \begin{align*} u+v &=(3,-1,2,3)+(0,2,2,1)\\ &=(3,1,4,4). \end{align*} (b) \begin{align*} v &=2 (0,2,2,1)\\ &=(0,4,4,2). \end{align*} (c) \begin{align*} u-v &=(3,-1,2,3)-(0,2,2,1)\\ &=(3,-3,0,2). \end{align*} (d) \begin{align*} 3u-2v &=3 (3,-1,2,3)-2 (0,2,2,1)\\ &=(9,-3,6,9)-(0,4,4,2)\\ &=(9,-7,2,7). \end{align*}
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.