Răspunsuri

  • Utilizator Brainly
2014-09-05T18:21:02+03:00
A=1+3+3²+3³+...+3⁴⁴
A=(1+3+3²)+3³·(1+3+3²)+3⁶·(1+3+3²)+...+3⁴²·(1+3+3²)
A= 13+ 3³ ·13+3⁶ * 13+...+3⁴² * 13
A=13·(1+3³+3⁶+...+3⁴²) se divide cu 13