Question

determine a pg de cinco termos sendo a1= 1/81 e q= 3 ​

Answer 1

$a_2~~=~~a_1~.~q~~=~~\frac{1}{81}~.~3~~=~~\frac{1~.~3}{81}~\rightarrow~~~\boxed{a_2~=~\frac{1}{27}}\\\\\\a_3~~=~~a_2~.~q~~=~~\frac{1}{27}~.~3~~=~~\frac{1~.~3}{27}~\rightarrow~~~\boxed{a_3~=~\frac{1}{9}}\\\\\\a_4~~=~~a_3~.~q~~=~~\frac{1}{9}~.~3~~=~~\frac{1~.~3}{9}~\rightarrow~~~\boxed{a_4~=~\frac{1}{3}}\\\\\\a_5~~=~~a_4~.~q~~=~~\frac{1}{3}~.~3~~=~~\frac{1~.~3}{3}~\rightarrow~~~\boxed{a_5~=~1}$