show that AX=B has a solution if rank[A| B] = rankA I really have no clue on this please help me out thanks (:

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Originally Posted by treetheta show that AX=B has a solution if rank[A| B] = rankA I really have no clue on this please help me out thanks (: Hint: if is not in the column space of then which is a contradition.

How does this help me show that if your showing me a contradicition