Question

calcule a soma dos primeiros 70 termos da PA (9,12,15,18...)​

Answer 1

Resposta:

A resposta é 209 .

9,12,15,18,21,24,27,30,33,36,39,42,45,48,51,54,57,60,63,66,69,72,75,78,81,84,87,90,93,96,99,102,105,108,111,114,117,120,123,126,129,132,135,138,141,144,147,150,153,156,159,162,165,168,170,173,176,179,182,185,188,191,194,197,200,203,206,209.