3 years ago

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

Mathematics

1 answer:

artcher [175]3 years ago

3 0

Answer:

Step-by-step explanation:

<h3>Geometric sequence formula: an=a1 r^n-1 </h3><h3>s8=1640=a1 3^8-1</h3><h3>1640=a1 3^8-1</h3><h3>1640=a1 3^7</h3><h3>1640=a1 2187</h3><h3>a1=1640/2187</h3>

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