Question

Sa se scrie primii 5 termeni ai sirurilor ($x_{n}$)$n_\geq {1}$ ; ($y_{n}$)$n_\geq {1}$ .

$x_{n}$ =$\frac{3n^{2} -1 }{n^{2}+1}$

Answer 1

x1=(3*1-1)/(1+1)=2/2=1

x2=(3*4-1)/(4+1)=11/5

x3= (3*9-1)/(9+1)=26/10=13/5

x4=(3*16-1)/(16+1)=47/17

x5=(3*25-1)/(25+1)=74/26