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If A=[(1,1,-1),(2,0,3),(3,-1,2)], B=[(1,...

If `A=[(1,1,-1),(2,0,3),(3,-1,2)], B=[(1,3),(0,2),(-1,4)] and C=[(1,2,3),(2,0,-2)].` prove that `(AB)C=A(BC)`

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