Решение:
2/7 = (2•2)/(2•7) = 4/14;
2/7 = (3•2)/(3•7) = 6/21;
2/7 = (5•2)/(5•7) = 10/35;
2/7 = (6•2)/(6•7) = 12/42;
2/7 = (9•2)/(9•7) = 18/63;
2/7 = (10•2)/(10•7) = 20/70;
2/7 = (12•2)/(12•7) = 24/84;
2/7 = (11•2)/(11•7) = 22/77;
2/7 = (14•2)/(14•7) = 28/98.
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Решение:
2/7 = (2•2)/(2•7) = 4/14;
2/7 = (3•2)/(3•7) = 6/21;
2/7 = (5•2)/(5•7) = 10/35;
2/7 = (6•2)/(6•7) = 12/42;
2/7 = (9•2)/(9•7) = 18/63;
2/7 = (10•2)/(10•7) = 20/70;
2/7 = (12•2)/(12•7) = 24/84;
2/7 = (11•2)/(11•7) = 22/77;
2/7 = (14•2)/(14•7) = 28/98.