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If A = [[-1,2,3],[5,7,9],[-2,1,1]] andB ...

If `A = [[-1,2,3],[5,7,9],[-2,1,1]] andB = [[-4,1,-5],[1,2,0],[1,3,1]]` , then verify that `(A+B)' = A' + B'`

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(A + B)' = A' + B'
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