Question: Let A be an n n matrix and let D be a n n diagonal matrix. (a) Show that D = (d11e1, d22e2,...,

Let A be an n × n matrix and let D be a n × n diagonal matrix.
(a) Show that D = (d11e1, d22e2,..., dnnen).
(b) Show that AD = (d11a1, d22a2, dnnan).

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