Răspunsuri

2014-08-25T09:32:24+03:00
Din(a,b)=7, obtinem a=7x,b=7y si (x,y)=1.Relatia a·b=294 devine 7x·7y=294 si impartind prin 49 termenii egalitatii obtinem x·y=294:49=6. Dupa valorile lui y studiem cazurile :
1.y=1⇒x=6⇒a=7·6=42;b=7·1=7 rezulta perechea (42,7)
2.y=2⇒x=3⇒a=7·3=21;b=7·2=14 rezulta perechea (21,14)
3.y=3⇒x=2⇒a=7·2=14;b=7·3=21 rezulta perechea (14,21)
4.y=6⇒x=1⇒a=7·1=7;b=7·6=42 rezulta perechea (7,42)

5 4 5