Question

4) DETERMINE o 10° termo da P.G.,1/3,1,3,9,...)
a) a10 = 6561
b) 210 = 19 683
c) a 10 = 2 187
d) 210 = 59 049
e) 210 = 729​

Answer 1

Resposta:

10° termo da P.G.,1/3,1,3,9,...)

q:é a razão

q=a₂/a₁ =1/(1/3) =1*(3/1)  =3

aₙ = a₁ *qⁿ⁻¹

a₁₀ = (1/3) * 3¹⁰⁻¹

a₁₀ =3⁻¹ * 3¹⁰⁻¹

a₁₀ = 3¹⁰⁻¹⁻¹

a₁₀ = 3⁸ =  6561

Letra A