Solution: In 510, determine whether the given matrix is orthogonal
Chapter 8, Problem 9(choose chapter or problem)
In Problems 5–10, determine whether the given matrix is orthogonal.
\(\left(\begin{array}{rrr} 1 & -1 & 1 \\ 1 & -1 & -1 \\ 1 & 2 & 0 \end{array}\right)\)
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