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Question
Find the inverse of the following matrix:
`[(1,-1),(2,3)]`
Solution
Let A =`[(1,-1),(2,3)]`
∴ |A| = 3 + 2 = 5
adj A = `[(3,1),(-2,1)]`
`"A"^-1 = 1/|"A"|` adj A = `1/5[(3,1),(-2,1)]`
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