Question

Verificati daca numerele 98 299 si 6 035 sunt termeni ai sirului de numere naturale a indice 1, a indice 2 ,... unde a indice n= 3 x n-1, n apartine N nenule. x=inmultire

Answer 1

n=33
3x33-1=99-1=98

n=100
3x100-1=300-1=299

n=2012
3x2012-1=6036-1=6025

sunt termeni ai sirului

Answer 2

[tex]3n-1=98\\3n=98+1\\3n=99\\n=\frac{99}{3}\\n=33\\3n-1=299\\3n=299+1\\3n=300\\n=\frac{300}{3}\\ n=100\\3n-1=6035\\3n=6035+1\\3n=6036\\n=\frac{6036}{3}\\n=2012\\Sfarsit![/tex]