| Exam Board | OCR MEI |
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| Module | FP1 (Further Pure Mathematics 1) |
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| Year | 2011 |
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| Session | January |
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| Topic | Proof by induction |
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6 A sequence is defined by \(u _ { 1 } = 5\) and \(u _ { n + 1 } = u _ { n } + 2 ^ { n + 1 }\). Prove by induction that \(u _ { n } = 2 ^ { n + 1 } + 1\).