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[C-3.," If "A^(-1)=[[3,-1,1],[-15,6,-5],...

[C-3.," If "A^(-1)=[[3,-1,1],[-15,6,-5],[5,-2,2]]&B=[[1,2,-2],[-1,3,0],[0,-2,1]]," find "(AB)^(-1)]

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