Respuesta :

first term: 3
second term : 3*3=9
third term: 9*3=27
geometric sequence
an=a1(r^(n-1))
r=common ratio
first term=a1

3rd term
a3=3(3^(3-1))
a3=3(3^2)
a3=3(9)
a3=27

3rd term si 27