Question

Calcule a soma dos seis primeiros termos da PG (1/81 , 1/27,...)

Answer 1

(1/81,1/27,...)

q=1/27.81/1

q=3

S6=1/81.(3^6-1)/3-1

S6=1/81.(3^5)/2

S6=1/81.243/2

S6=243/162

S6= 81/54

S6=3/2