Question

Calcule a soma dos 10 primeiros termos do pg finito (3,6,12,24..)

Answer 1

6/3 = 2
12/6 = 2
q= 2 


s10 = a1 (q^n -1)/ (q-1)  = 3 (2^9-1)/(2-1) = 3(512-1)= 1533