Question: 15. Let A and B be matrices for which the product matrix AB is defined. and let uj and vj denote the jth columns of

15. Let A and B be matrices for which the product matrix AB is defined. and let uj and vj denote the jth columns of AB and B, respectively. If Up = C10j1 + C2Vi2 + . . . + CkUj for some scalars c1, C2, . . . Ck, prove that Up = Cluj +Caujz + ... + ckuj . Visit goo. gl/sRpves for a solution

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