Question

Calcule o 9° termo da P.G. (4,24,144,...).

Answer 1

Resposta:

q=a2/a1=24/4=6

a1=4

n=9

an=a1*(q^(n-1)

a9 = 4 *9^(9-1)

a9 =4*9^8 = 172186884