Answer
$2\sqrt 2$
Work Step by Step
We are given:
$u=(3,-4)$
$v=(1,1)$
$w=(-1,0)$
Determine $|-2v|$:
$|-2v|=|-2(1,1)|=|(-2,-2)|=\sqrt{(-2)^2+(-2)^2}=\sqrt{8}=2\sqrt 2$
Calculus: Early Transcendentals (2nd Edition)
by Briggs, Bill L.; Cochran, Lyle; Gillett, Bernard
Published by
Pearson
ISBN 10:
0321947347
ISBN 13:
978-0-32194-734-5
Chapter 11 - Vectors and Vector-Valued Functions - 11.1 Vectors in the Plane - 11.1 Exercises - Page 768: 35
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