Answer
$4\sqrt 5-1$
it is a scalar.
Work Step by Step
$||w||-1=\sqrt {w⋅w}-1=\sqrt {⟨−4,2⟩⋅⟨−4,2⟩}-1=\sqrt {-4(-4)+2(2)}-1=\sqrt {20}-1=4\sqrt 5-1$
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 8 - 8.4 - Vectors and Dot Products - 8.4 Exercises - Page 595: 19
Update this answer!
You can help us out by revising, improving and updating this answer.
Update this answerAfter 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.
