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Consider A and B as 2xx2 matrices with determinant equal to 1 then tr(AB)-tr(A).tr(B)+tr(AB^(-1))+2 is_______

Answer»


Solution :`B^(2)-tr(B).B+l=0`
`impliesAB-(tr(B)A+AB^(-1)=0`
`:. Tr(AB)-tr(A)tr(B)+tr(AB^(-1))=0`


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