Answer
(a) $4i$
(b) $7i+3j$
(c) $-5i+j$
Work Step by Step
$u = 2i, v = i + j$
(a)
$2u=2(2i)=4i$
(b)
$2u + 3v=2(2i)+3(i+j)$
$=4i+3i+3j$
$=7i+3j$
(c)
$v - 3u=i+j-3(2i)$
$=i+j-6i$
$=-5i+j $
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: 31
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