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[" 14) "quad [[1,-2,1],[-2,3,1],[1,1,5]]...

[" 14) "quad [[1,-2,1],[-2,3,1],[1,1,5]]" .Verify that "],[[" (i) "[adjA]^(-1)=,adj,(A^(-1))," (ii) "(A^(-1))^(-1)=A]]

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