| Exam Board | OCR MEI |
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| Module | C2 (Core Mathematics 2) |
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| Year | 2012 |
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| Session | January |
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| Topic | Geometric Sequences and Series |
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9 A geometric progression has a positive common ratio. Its first three terms are 32, \(b\) and 12.5.
Find the value of \(b\) and find also the sum of the first 15 terms of the progression.