Question

Calculeaza suma numerelor naturale cuprinde intre 9,(23) si 451/12

Answer 1

9.(23)
451/12=37.58(3)
Numerele naturale aflate intre cele doua numere sunt: 10,11,12,......,37
S=10+11+12+....+37=1+2+3+...+37-(1+2+3+...+9)=37*38/2-9*10/2=1406/2-90/2=703-45=658