Answer: In Exercises 9–12, find (a) the orthogonal
Chapter 6, Problem 11E(choose chapter or problem)
In Exercises 9–12, find
(a) the orthogonal projection of b onto Col A and
(b) a least-squares solution of Ax = b.
\(A=\left[\begin{array}{rrr} 4 & 0 & 1 \\ 1 & -5 & 1 \\ 6 & 1 & 0 \\ 1 & -1 & -5 \end{array}\right], \mathbf{b}=\left[\begin{array}{l} 9 \\ 0 \\ 0 \\ 0 \end{array}\right]\)
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