(a) Suppose all columns of B are the same. Then all columns of EB are the same, because
Chapter 1, Problem 1.4.35(choose chapter or problem)
(a) Suppose all columns of B are the same. Then all columns of EB are the same, because each one is E times . (b) Suppose all rows of B are [1 2 4]. Show by example that all rows of EB are not [1 2 4]. It is true that those rows are .
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