Posted by **Chris** on Tuesday, September 15, 2009 at 7:24pm.

(a) Show that if A is an m x n matrix and A(BA) is defined, then B is an n x m matrix.

(b) Show that if A has a row of zeros and B is any matrix for which AB is defined, then AB also has a row of zeros.

(c) Find a similar result involving a column of zeros.

Thanks!!!

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