06-05-2020
Mathematics

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Geometric sequence formula for 3, 9, 27, 81 243

Respuesta :

mysticchacha mysticchacha

07-05-2020

Answer:

[tex]a_{n}[/tex] = 3*[tex]3^{n-1}[/tex]

Step-by-step explanation:

We notice that the common ratio = 9/3 = 3

and 27/9 = 3

the first term is 3

so

a_n = a_1 * r^(n-1) is the formula.

so

a_n = 3 * 3^(n-1)

[tex]a_{n}[/tex] = 3*[tex]3^{n-1}[/tex]

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