Question

ache a soma dos 10 primeiros termos da pg (2,4,8,...)

Answer 1

An=a1.q^n-1
A10=2.2^10-1
A10=2.2^9
A10=2.512
A10=1024
Sn=a1.(q^n-1)/q-1
S10=2.(2^10-1)/2-1
S10=2.(2^9)/1
S10=2.512/1
S10=1024/1
S10=1024