1. (10%) Use the elementary row operations to find the inverse of the matrix \( \begin{bmatrix} 1 & 0 & 1 \\ -1 & 1 & 1 \\ -1 & -2 & -3 \end{bmatrix} \)
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1. (10%) Use the elementary row operations to find the inverse of the matrix \( \begin{bmatrix} 1 & 0 & 1 \\ -1 & 1 & 1 \\ -1 & -2 & -3 \end{bmatrix} \)