| Exam Board | OCR MEI |
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| Module | Paper 2 (Paper 2) |
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| Session | Specimen |
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| Topic | Proof |
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11 Suppose \(x\) is an irrational number, and \(y\) is a rational number, so that \(y = \frac { m } { n }\), where \(m\) and \(n\) are integers and \(n \neq 0\).
Prove by contradiction that \(x + y\) is not rational.