| Exam Board | Edexcel |
|---|
| Module | P4 (Pure Mathematics 4) |
|---|
| Year | 2018 |
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| Session | Specimen |
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| Topic | Proof |
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6. Prove by contradiction that, if \(a , b\) are positive real numbers, then \(a + b \geqslant 2 \sqrt { a b }\)
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