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If A = diag (3 -2, 5) and B = diag (1 3 -4), find (A + B).

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Best answer

We are given two diagonal matrices A and B,

On adding the two diagonal matrices of order (3 x 3) we get an diagonal matrix of order (3 x 3)

Each of the elements get added to the corresponding element hence, 

we get after adding,

Hence, we get A+B = diag(4 1 1)

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