I don't know how to construct formal proofs but there is the obvious geometric approach for 2 and 3 factors. However, how do you prove the commutative property holds up for 4+ factors? You end up with a lot of different orders in which you can multiply the factors and you can't just construct a geometric object from them.(adsbygoogle = window.adsbygoogle || []).push({});

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# How do you prove the commutative property of multiplication for 4+ factors?

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