Find the Inverse of the Given Matrix, If It Exists $\left[ \begin{array} { c c c } 1 & 1 & 1 \\1 & 0 & 9 \\1 & - 1 & 1\end{array} \right]$

question 49

Essay

Find the inverse of the given matrix, if it exists.
​ $\left[ \begin{array} { c c c } 1 & 1 & 1 \\1 & 0 & 9 \\1 & - 1 & 1\end{array} \right]$

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