Question

progresion geometrica 1/2,1/6,1/18 n=20

Answer 1

el primer termino es = 1/2

la razon es = (1/2)/(1/6) = 1/3

patra poder hallar el término "n" se usa la formula

Tn = T1(r)^(n-1)

Tn = 1/2 (1/3)^(20-1)

Tn = 1/2 (1/3)^19

Tn = 1/2 (1/3^19)

Tn = 1/(2 * 3^19)

Tn = $\frac{1}{(2)(3^{19} )}$