Let TA : R3 R$ be multiplication by the orthogonal matrix 1 2 - 3 3 -- 2 A = 3 2 1 Find TA(x) for the vector x = 3 3 - - 3 5 2 1 2 7 - - - 3 3 - 3 19 TA(x) = 3 25 3 Using the Euclidean inner product on R, verify that ||TA(x)|| = ||x|. ||TA(x)|| =| 115 115 ||æ|| |

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter5: Orthogonality
Section5.3: The Gram-schmidt Process And The Qr Factorization
Problem 20EQ
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Let TA : R$
R$ be multiplication by the orthogonal matrix
1
2
3
3
6-
2
A =
3
1
Find TA(x) for the vector x =
3
3
-
-
-
3
5
2
1
2
7
-
-
- -
3
3
-
3
19
TA(x) =
3
25
3
Using the Euclidean inner product on R, verify that ||TA(x)|| = ||x|.
||TA(x)|| =| 115
||æ||
115
|
Transcribed Image Text:Let TA : R$ R$ be multiplication by the orthogonal matrix 1 2 3 3 6- 2 A = 3 1 Find TA(x) for the vector x = 3 3 - - - 3 5 2 1 2 7 - - - - 3 3 - 3 19 TA(x) = 3 25 3 Using the Euclidean inner product on R, verify that ||TA(x)|| = ||x|. ||TA(x)|| =| 115 ||æ|| 115 |
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