Answer
$2i $
Work Step by Step
We take the cross product:
$(j-k)\times(j+k)$
$=j\times j + j\times k - k\times j - k\times k $
Recall that $j\times k=i$:
$=0 + i + i + 0$
$=2i $
Calculus (3rd Edition)
by Rogawski, Jon; Adams, Colin
Published by
W. H. Freeman
ISBN 10:
1464125260
ISBN 13:
978-1-46412-526-3
Chapter 13 - Vector Geometry - 13.4 The Cross Product - Exercises - Page 677: 14
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.
