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

यदि `A = [(1,2,3),(-1,0,2),(1,-3,-1)], B = [(4,5,6),(-1,0,1),(2,1,2)]` तथा `C = [(-1,-2,1),(-1,2,3),(-1,-2,2)] A + (B + C) = (A + B) + C` को सत्यापित करे ।

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