Question

determine a soma dos 10 primeiros termos da PG(1,2,4,8,...)

Answer 1

an=a1.q^n-1
an=1.2^10-1
an=1. 2^9
an= 1.512
an=512

S10=(1+512).10/2
S10=513.10/2
S10=1026/2
S10=513