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Obtain the inverse of the following mat...

Obtain the inverse of the following matrix using elementary operations `A=[0 1 2 1 2 3 3 1 1]`.

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The correct Answer is:
`[((1)/(2),(-1)/(2),(1)/(2)),(-4,3,-1),((5)/(2),(-3)/(2),(1)/(2))]`
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