http://huzhepidarasa.livejournal.com/ ([identity profile] huzhepidarasa.livejournal.com) wrote in [personal profile] avva 2014-09-15 05:29 am (UTC)

Тут как ни доказывай, все равно x^3=-1 само на каком-то шаге вылезает, после чего док-во можно прекращать, т.к. x^7=x.

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