In 1118, proceed as in Example 3 to construct an orthogonal matrix from the eigenvectors
Chapter 8, Problem 11(choose chapter or problem)
In Problems 11–18, proceed as in Example 3 to construct an orthogonal matrix from the eigenvectors of the given symmetric matrix. (The answers are not unique.)
\(\left(\begin{array}{ll} 1 & 9 \\ 9 & 1 \end{array}\right)\)
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