Question

qual o 10° termo da PG (9,27..)

Answer 1

n= 10
q = a₂/a₁ = 27/9 = 3
a₁ = 9
an= ?

an= a₁ x q^n-1
an= 9 x 3¹⁰⁻¹
an= 9 x 3⁹
an= 3² x 3⁹
an= 3²⁺⁹
an= 177147