Linear Algebra and Its Applications (5th Edition)

Published by Pearson
ISBN 10: 032198238X
ISBN 13: 978-0-32198-238-4

Chapter 1 - Linear Equations in Linear Algebra - 1.8 Exercises - Page 70: 31

Answer

See explanation

Work Step by Step

since $\left\{\mathrm{v}_{1}, \mathrm{v}_{2}, \mathrm{v}_{3}\right\}$ is a linearly dependent set, there exist weights $c_{1}, c_{2}, c_{3}$ such that \[ c_{1} \mathrm{v}_{1}+c_{2} \mathrm{v}_{2}+c_{3} \mathrm{v}_{3}=0 \] Thus, \[ T\left(c_{1} \mathbf{v}_{1}+c_{2} \mathbf{v}_{2}+c_{3} \mathbf{v}_{3}\right)=T(\mathbf{0}) \] By the properties of linear equations, \[ c_{1} T\left(\mathbf{v}_{1}\right)+c_{2} T\left(\mathbf{v}_{2}\right)+c_{3} T\left(\mathbf{v}_{3}\right)=\mathbf{0} \] Thus, $\left\{T\left(\mathbf{v}_{1}\right), T\left(\mathbf{v}_{2}\right), T\left(\mathbf{v}_{3}\right)\right\}$ is a linearly dependent set
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