Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 1305071751
ISBN 13: 978-1-30507-175-9

Chapter 9 - Section 9.4 - Vectors in Three Dimensions - 9.4 Exercises - Page 658: 23

Answer

$<3, 1, -2>$ $3i + j -2k$

Work Step by Step

The question asks to find the vector $-2u + 3v$ in component form and in terms of i, j, and k Given $u = <0, -2, 1>$ and $v = <1, -1, 0>$ $-2u + 3v = -2<0, -2, 1> + 3<1, -1, 0>$ $ = <0 + 3, 4 - 3, -2 + 0> = <3, 1, -2>$ You can convert component form directly into the terms of i, j, and k: $<3, 1, -2> = 3i + j -2k$
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