| Exam Board | OCR MEI |
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| Module | Paper 3 (Paper 3) |
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| Year | 2021 |
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| Session | November |
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| Topic | Arithmetic Sequences and Series |
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6 In this question you must show detailed reasoning.
Show that \(\sum _ { r = 1 } ^ { 3 } \frac { 1 } { \sqrt { r + 1 } + \sqrt { r } } = 1\).