| Exam Board | OCR |
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| Module | Stats 1 (Statistics 1) |
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| Year | 2018 |
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| Session | December |
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| Topic | Proof |
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7
- Show that, if \(n\) is a positive integer, then \(\left( x ^ { n } - 1 \right)\) is divisible by \(( x - 1 )\).
- Hence show that, if \(k\) is a positive integer, then \(2 ^ { 8 k } - 1\) is divisible by 17.