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Concursul Matefbc editia a 4-a problema 3

Posted: Sun Dec 06, 2009 9:44 pm
by Andi Brojbeanu
Aratati ca daca \( x \) si \( y \) sunt numere naturale prime intre ele, atunci \( c.m.m.d.c.(x^2+y^2, xy)=1 \).