Calcule a soma dos 15 primeiros termos da PG (1,2,4,8,…)

1 - P.A (2,13,24,35,46,57,68,79,90,101,112,123,134,145,156,167,178,189,200,211,222,233,244,255,266,277,288,299,310,321,332,343,354,365,376,387,398,409,420,431)

O 40 Termo da P.A é (431)