The sum of the first three terms of a geometric sequence is 8 and the sum of the first six terms is 12. What is the common ratio? - Quora
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What is the sum of the following geometric sequence series, 729-243+81-27+… (12th terms)? - Quora
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Solved 3. Given a geometric sequence 8000, 6400, 5120, ... | Chegg.com
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partial sums of a geometric sequence - YouTube
Solved 6. Determine the common ratio, the 9th term, and the | Chegg.com
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