| Exam Board | CAIE |
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| Module | P1 (Pure Mathematics 1) |
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| Year | 2016 |
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| Session | June |
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| Topic | Arithmetic Sequences and Series |
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4 The 1st, 3rd and 13th terms of an arithmetic progression are also the 1st, 2nd and 3rd terms respectively of a geometric progression. The first term of each progression is 3 . Find the common difference of the arithmetic progression and the common ratio of the geometric progression.