Question

dada a P.G (3,9,27,81,...) determine 9° termo ​

Answer 1

an=a1.q^n-1

q=9/3=3

a9=3.3^9-1

a9=3.3^8

a9=3.6561

a9=19683

Answer 2

resolucao!

q = a2 / a1

q = 9 / 3

q = 3

a9 = a1 * q^8

a9 = 3 * 3^8

a9 = 3 * 6561

a9 = 19683