Respuesta :

joshlind3

Answer:

Step-by-step explanation:

The sequence is geometric

it can be defined as

[tex]S_n = a*b^n^-^1\\2 = ab^0\\8 = ab^1[/tex]

[tex]2 = a\\8 = 2*b\\b = 4\\S_n = 2(4)^n^-^1[/tex]

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