Question

Calcule a soma dos 05 termos da pg (5,70,…)? Help-me

Answer 1

$> \: resolucao \\ \\ \geqslant \: progressao \: \: geometrica \\ \\ a1 = 5 \\ a2 = 70 \\ n = 5 \\ q = \frac{a2}{a1} = \frac{70}{5} = 14 \\ \\ = = = = = = = = = = =$

$> \: soma \: dos \: termos \: da \: pg$

$sn = \frac{a1(q {}^{n} - 1)}{q - 1} \\ sn = \frac{5(14 {}^{5} - 1)}{14 - 1} \\ sn = \frac{5(537824 - 1)}{13} \\ sn = \frac{5 \times 537823}{13} \\ sn = \frac{2689115}{13} \\ sn = 206855 \\ \\ \geqslant \leqslant \geqslant \leqslant \geqslant \leqslant \geqslant \geqslant$