Respostas

2013-06-17T18:01:47-03:00

an=a1.q^n-1

2916=4.q^7-1

2916/4=q^6

729=q^6

3^6=q^6

q=3

Então:

P.G(4,12,36,108,324,972,2916)

5 4 5