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 - Section 12.5 - Lines and Planes in Space - Exercises 12.5 - Page 726: 3

Answer

$\left\{\begin{array}{l} x=-2+t\\ y=t\\ z=3-t \end{array}\right., \quad -\infty \lt t \lt \infty$ (Other answers are possible.)

Work Step by Step

Given a point on the line $P(x_{0},y_{0},z_{0})$ and if the line is parallel to ${\bf v}=\langle v_{1},v_{2},v_{3}\rangle$, the standard parametrization is given by formula (6), $\left\{\begin{array}{l} x=x_{0}+v_{1}t\\ y=y_{0}+v_{2}t\\ z=z_{0}+v_{3}t \end{array}\right., \quad -\infty \lt t \lt \infty$ --- Here, $\overrightarrow{PQ}=\langle 3+2,5-0,-2-3 \rangle=\langle 5,5, -5 \rangle=5\langle 1,1, -1 \rangle$ so we take ${\bf v}$=$\langle 1,1, -1 \rangle$. A point on the line is $P(-2,0,3)$, so a parametrization can be $\left\{\begin{array}{l} x=-2+t\\ y=t\\ z=3-t \end{array}\right., \quad -\infty \lt t \lt \infty$
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