Linear Algebra and Its Applications (5th Edition)

Published by Pearson
ISBN 10: 032198238X
ISBN 13: 978-0-32198-238-4

Chapter 2 - Matrix Algebra - 2.1 Exercises - Page 103: 20

Answer

The second column of AB is zero.

Work Step by Step

We are not told the sizes of A and B, but the assumption of the problem is that the matrices have a product AB. By setting up an arbitrary matrix, it is clear that the second column of AB is comprised of all 0s; this is because each value of the row of A will be multiplied by 0 to fill the second column of AB with zeroes.
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.

GradeSaver will pay $15 for your literature essays
GradeSaver will pay $25 for your college application essays
GradeSaver will pay $50 for your graduate school essays – Law, Business, or Medical
GradeSaver will pay $10 for your Community Note contributions
GradeSaver will pay $500 for your Textbook Answer contributions