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Let A=[{:(1,-2,1),(-2,3,1),(1,1,5):}]. V...

Let `A=[{:(1,-2,1),(-2,3,1),(1,1,5):}]`. Verify that ltbtgt (i) `[adjA]^(-1)=adj (A^(-1))`
(ii) `(A^(-1)^(-1)=A`

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