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Question
Using elementary transformation, find the inverse of a matrix `[(-1,1,2),(1,2,3),(3,1,1)]`
Options
`[(1,-1,1),(-8,7,-5),(5,-4,3)]`
`[(2,-1,1),(-6,7,-5),(5,-4,3)]`
`[(2,-1,1),(-6,4,-5),(5,-4,3)]`
`[(1,-1,1),(-6,4,-5),(5,-4,3)]`
MCQ
Solution
`[(1,-1,1),(-8,7,-5),(5,-4,3)]`
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