Question

Progressao aritmetica

Answer 1

Explicação passo-a-passo:

a)$A_{n} =2n^{2}+1$

$A_{1} =2.1^{2}+1=2.1+1=2+1=3\\A_{2} =2.2^{2}+1=2.4+1=8+1=9\\A_{3} =2.3^{2}+1=2.9+1=18+1=19\\A_{4} =2.4^{2}+1=2.16+1=32+1=33$

(3, 9, 19, 33, ...)