# Find the inverse of the matrix A = $\left[\begin{array}{ccc}1& 2& -2\\ -1& 3& 0\\ 0& -2& 1\end{array}\right]$ by using elementary row transformations.                                                               OR Using properties of determinants, prove the following :

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• 2
find its cofactor
arrange it and find its transpose
that is its adjoint then use this formula