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Question: please help with a and b...

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1. (a) Let 1 r, s n and r s. Let Jrs be the n × n matrix whose rs-com- Show that ponent is 1 and all other components are 0. Let EIJ D(%) = 1. (b) Let A be an n x n matrix. What is the effect of multiplying ErA? of mul tiplying AE,,?

Please help with a and b

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