Thomas' Calculus 13th Edition

Published by Pearson
ISBN 10: 0-32187-896-5
ISBN 13: 978-0-32187-896-0

Chapter 12: Vectors and the Geometry of Space - Practice Exercises - Page 734: 21


${\bf i}\times{\bf (i+j)}={\bf k}$

Work Step by Step

${\bf i}\times{\bf (i+j)}=\left|\begin{array}{lll} {\bf i} & {\bf j} & {\bf k}\\ 1 & 0 & 0\\ 1 & 1 & 0 \end{array}\right|$ $=(0-0){\bf i}-(0-0){\bf j}+(1-0){\bf k}={\bf k}$
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