I have the following problem which I can't figure out.(adsbygoogle = window.adsbygoogle || []).push({});

Let A = [a_11,a_12;a_13; a_21; a_22; a_23;]

Show that A has rank 2 if and only if one or more of the determinants

| a_11,_a_12; a_21,a_22| , |a_11,a_13;a_21,a_23|,|a_12,a_13;a_22,a_23|

I know its a 2x3 matrix..which the det. wouldn't apply since it is not square. Not sure how to proceede

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# Linear Algebra and rank problem.

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