а) 2,(4) = 2 + 0.4 + 0.04 + 0.004 + ... = 2 + 4/9 = 22/9
б) 3,(5) = 3 + 0.5 + 0.05 + 0.005 + ... = 3 + 5/9 = 32/9
в) 2,(17) = 2 + 0.17 + 0.0017 + 0.00017 + ... = 2 + 17/99 = 235/99
г) 2,1(7) = 2 + 1.7 + 0.017 + 0.00017 + ... = 2 + 1.7 + 0.01 * (7/9) = 2 + 1.7 + 7/900 = 1873/900
д) 2,17(1) = 2 + 17.1 + 0.01 + 0.001 + ... = 2 + 17.1 + 0.01 * (1/9) = 2 + 17.1 + 1/900 = 1891/900
а) 2,(4) = 2 + 0.4 + 0.04 + 0.004 + ... = 2 + 4/9 = 22/9
б) 3,(5) = 3 + 0.5 + 0.05 + 0.005 + ... = 3 + 5/9 = 32/9
в) 2,(17) = 2 + 0.17 + 0.0017 + 0.00017 + ... = 2 + 17/99 = 235/99
г) 2,1(7) = 2 + 1.7 + 0.017 + 0.00017 + ... = 2 + 1.7 + 0.01 * (7/9) = 2 + 1.7 + 7/900 = 1873/900
д) 2,17(1) = 2 + 17.1 + 0.01 + 0.001 + ... = 2 + 17.1 + 0.01 * (1/9) = 2 + 17.1 + 1/900 = 1891/900