а) 0,(7) = 7/9
б) 2,4(3) = 2 + 4/10 + 3/90 = 2 + 2/5 + 1/30 = 10/5 + 2/5 + 1/30 = 12/5 + 1/30 = (126)/(56) + 1/30 = 72/30 + 1/30 = 73/30
а) 0,(7) = 7/9
б) 2,4(3) = 2 + 4/10 + 3/90 = 2 + 2/5 + 1/30 = 10/5 + 2/5 + 1/30 = 12/5 + 1/30 = (126)/(56) + 1/30 = 72/30 + 1/30 = 73/30