Answer
(a) $-2i+4j$
(b) $i+j $
(c) $4i-7j$
Work Step by Step
$ u = -i + 2j, v = i - j $
(a)
$2u=2(-i+2j)$
$=-2i+4j$
(b)
$2u + 3v=2(-i+2j)+3(i-j)$
$=-2i+4j+3i-3j $
$=i+j $
(c)
$v - 3u= i-j-3(-i+2j)$
$=i-j +3i-6j$
$=4i-7j$
Trigonometry (11th Edition) Clone
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
978-0-13-421743-7
ISBN 13:
978-0-13421-743-7
Chapter 7 - Applications of Trigonometry and Vectors - Section 7.5 - Applications of Vectors - 7.5 Exercises - Page 343: 32
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