mylescoifman mylescoifman

30-04-2020
Mathematics

contestada

How do I find a1 for the geometric sequence down below
Sn = 1640, r = 3, n = 8

Respuesta :

Mar92781 Mar92781

30-04-2020

Answer:

a1=1640/2187

Step-by-step explanation:

Geometric sequence formula: an=a1 r^n-1

s8=1640=a1 3^8-1

1640=a1 3^8-1

1640=a1 3^7

1640=a1 2187

a1=1640/2187

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