Question

dada a pg (1,2,4...)calcule a soma dos nove primeiros termos

Answer 1

2/1= 2

a1= 1
n=9
q=2

S=a1(q^n-1)/q-1

S= 1(2^9 -1)/2-1
S=1(512-1)/1
S=1(511)/1
S=511/1
S=511

Soma= 511

Abraços