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Problem
Problem
Find the inverse of the matrix
[
1
2
5
2
3
1
−
1
1
1
]
,
using elementary row operations.
\begin{bmatrix} 1 & 2 & 5 \\ 2 & 3 & 1 \\ -1 & 1 & 1 \end{bmatrix}, \text{ using elementary row operations.}
1
2
−
1
2
3
1
5
1
1
,
using elementary row operations.
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