Question

Calcule a soma dos dez primeiros termos da P.G.(1,2,4...)

Answer 1

an=a1.q^n-1
a10=1.2^10-1
a10=1.512
a10=512

sn=a1(q^n -1)/q-1
s10=1(2^10 -1)/2-1
s10=1023/1
s10=1023