Find the sum of the first nine terms of a geometric sequence that has a 3rd term

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Find the sum of the first nine terms of a geometric sequence that has a 3rd term of 45 and a 6th term of 1215.

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Complete Pure Mathematics 1 For Cambridge International AS & A Level

ISBN: 9780198427438

2nd Edition

Authors: Jean Linsky, Brian Western, James Nicholson

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Question Posted: Apr 14, 2023 10:30 AM

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Find the sum of the first nine terms of a geometric sequence that has a 3rd term

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ANSWER Lets call the first term of the sequence a and the common ratio r Then we can use t...View the full answer

Complete Pure Mathematics 1 For Cambridge International AS & A Level

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