Question

Seja a PG (4,8,16,...), determine:

Quais os valores de a25, a40 e 80 ?

Answer 1

Nesta PG temos a1 = 4 e q=2

$a_{25}=4.2^{24}=4.16.777.216=67.108.864 \\ \\ a_{40}=4.2^{39}=4.549.755.813.888=2.199.023.255.552 \\ \\ a_{80}=4.2^{79}=4.604.462.909.807.314.587.353.088=2.417.851.639.229.258.349.412.352$