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[qquad [|f^(-1)=[[3,-1,1],[-15,6,-5],[5,...

[qquad [|f^(-1)=[[3,-1,1],[-15,6,-5],[5,-2,2]]" and "B=[[1,2,-2],[-1,3,0],[0,-2,1]]" ,find "(AB)^(-1)],[" pliint ":(AB)^(-1)=B^(-1)A^(-1)," find "B^(-1)" and then find "B^(-1)A^(-1)" ] "]]

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