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If A is an upper triangular matrix of or...

If `A` is an upper triangular matrix of order `nxxna n dB` is a lower triangular matrix of order `nxxna n dB` is a lower triangular matrix of order `nxxn` , then prove that `(A^(prime)+B)xx(A+B ')` will be a diagonal matrix of order `nxxn` [assume all elements of A and dB to e non-negative and a element of `(A^(prime)+B)xx(A+B^(prime))a sC_(i j)` ].

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