New answer: In 15 - 26, use Theorem 8.6.4 to find the inverse of the given matrix or
Chapter 8, Problem 25(choose chapter or problem)
In Problems 15-26, use Theorem 8.6.4 to find the inverse of the given matrix or show that no inverse exists.
\(\left(\begin{array}{rrrr} 1 & 2 & 3 & 1 \\ -1 & 0 & 2 & 1 \\ 2 & 1 & -3 & 0 \\ 1 & 1 & 2 & 1 \end{array}\right)\)
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