Question

qual o termo da pg (729,2430,8100,..) que e igual a 300.000

Answer 1

a1 = 729
a2 = 2430
q = 2430/729  =  10/3
an = 300.000
300.000 = 729 *  ( 10/3 )ⁿ⁻¹
( 10/3 )ⁿ⁻¹ = 300.000/729 = 100.000/ 243
(10/3)ⁿ⁻¹ = (10/3)⁵
n - 1 = 5
n = 5 + 1 = 6 ****
PG{ 729, 2430,8100,27000, 90000,300.000]