diannwillis diannwillis

07-05-2020
Mathematics

contestada

What is the explicit formula for this geometric sequence?
8,4, 2, 1, ...

Respuesta :

mysticchacha mysticchacha

07-05-2020

Answer:

[tex]a_{n}[/tex] = 8 *[tex]0.5^{n-1}[/tex]

Step-by-step explanation:

First find the common ratio

r = 4/8 = 1/2

and first term is 8

a_n = a_1 * r^(n-1)

a_n = 8 * (1/2)^(n-1)

[tex]a_{n}[/tex] = 8 *[tex]0.5^{n-1}[/tex]

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