Question

Determine os cinco primeiros termos de uma sequência onde A1 = 4 e an=an-1 + 3 N​

Answer 1

Resposta:

S = {4, 10, 19, 31, 46)

Explicação passo-a-passo:

$a_n=a_n_-_1+3n\\\\p/n=2 \implies a_2=a_1+3n\implies a_2=4+3.2\implies a_2=4+6\implies a_2=10\\\\p/n=3\implies a_3=a_2+3n\implies a_3=10+3.3\impliesa\implies a_3=10+9\implies a_3=19\\\\p/n=4 \impliesa\implies a_4=a_3+3n \impliesa=19+3.4 \implies a_4=19+12 \implies a_4=31\\\\p/n=5 \impliesa\implies a_5=a_4+3n \implies a_5=31+3.5 \implies a_5=31+15 \implies a_5=46\\\\(4,10,19,31,46)$