Question

Na P.G (81,27,9...) o nono termo é?

Answer 1

Fórmula do termo geral:
an = a1 . q^(n-1)

q = 27/81 = 1/3

a9:
a9 = 81 . (1/3)^(9-1)
a9 = 81/6561 = 1/81

Answer 2

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Ola Nataly

PG

u1 = 81
u2 = 27

razão

q = u2/u1 = 27/81 = 1/3

u9 = u1*q^8 

u9 = 81* /1/3)^8 = 81/81² = 1/81 

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