Differential Equations and Linear Algebra (4th Edition)

Published by Pearson
ISBN 10: 0-32196-467-5
ISBN 13: 978-0-32196-467-0

Chapter 6 - Linear Transformations - 6.2 Transformations of R2 - Problems - Page 397: 5

Answer

See below

Work Step by Step

Let's reduce $A$ to the row-echelon form $\begin{bmatrix} 0 & 2\\ 2 & 0 \end{bmatrix}\approx \begin{bmatrix} 2 & 0\\ 0 & 2 \end{bmatrix}\approx\begin{bmatrix} 1 & 0\\ 0 & 2 \end{bmatrix}\approx \begin{bmatrix} 1 & 0\\ 0 & 1 \end{bmatrix}$ where $1. P_{12}\\ 2. M_1(\frac{1}{2})\\ 3. M_2 (\frac{1}{2})$ Thus, $T(x)=Av=P_{12}M_1(2)M_2(2)x$ The transformation of $R^2$ with the matrix of transformation $A$ is a product of a linear stretch in the y-direction followed by a linear stretch in the x-direction and followed by a reflection in $y=x$
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