Question

Determinați suma primelor 100 zecimale a nr: 7,1(3);19/6;137/75;47/33

Answer 1

Răspuns:

7,1(3) = 7,133333...

1+3+3+3+...+3 = 1+3•99 = 1+297 = 298

19/6 = 3,1(6) = 3,16666...

1+6+6+...+6 = 1+6•99 = 1+594 = 595

137/75 = 1,82(6) = 1,8266666...

8+2+6+6+...+6 = 10+6•98 = 10+588 = 598

47/33 = 1,(42) = 1,424242...

4+2+4+2+...+2 = 6•50 = 300