Question

Calcule a soma dos 12 primeiros termos da P.A. (1,4,7, 10, 13, 16, ...)​

Answer 1

Resposta:

210

Explicação passo-a-passo:

(1, 4, 7, 10, 13, 16, ...)

Razão = 3, logo:

(1, 4, 7, 10, 13, 16, 19, 22, 25, 28, 31, 34, ...)

Soma: 1+4+7+10+13+16+19+22+25+28+31+34 = 210