Matrix Multiplication

From: Billy Smith <Whitesox2704@xxxxxxx>
Date: Thu, 28 Sep 2006 13:52:40 EDT

I need help prove that if A and B are matrices, and c is any scalar then

c(AB) = (cA)B = A(cB).

We assume that AB is possible.

I can't seem to get it right, I was able to prove c(A+B)=cA+cB with no problem, but for some reason I cannot get this one. Thanks for all the help provided.
.

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