| Exam Board | OCR MEI |
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| Module | C3 (Core Mathematics 3) |
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| Year | 2016 |
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| Session | June |
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| Topic | Modulus function |
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4 By sketching the graphs of \(y = | 2 x + 1 |\) and \(y = - x\) on the same axes, show that the equation \(| 2 x + 1 | = - x\) has two roots. Find these roots.