Question

quantos termos tem a PG finita(3,6,12,...,3072)?

Answer 1

Ola Michele 

u1 = 3
u2 = 6

un = 3072 

q = u2/u1 = 6/3 = 2

termo geral

un = u1*q^(n - 1)

3072 = 3*2^(n - 1) 

2^(n - 1) = 3072/3 = 1024 = 2^10 

n - 1 = 10

n = 11 termos