Question

Sa se determine x2 +x3 stiind ca x1=1 si xn+1=5xn-2
N+1=este indice
Muuuultumesc

Answer 1

x1=1 si xn+1=5(xn)-2, inlocuim pe n=1, rezulta x2=5x1 -2=5*1 -2=3, deci x2=3, inlocuim in relatia data pe n=2, se obtine x3=5x2 -2=5*3 -2 adica x3=15-2=13, ⇒ x2+x3=3+13=16