| Exam Board | OCR MEI |
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| Module | Paper 3 (Paper 3) |
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| Year | 2019 |
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| Session | June |
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| Topic | Proof |
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4 In this question you must show detailed reasoning.
Show that \(\frac { 1 } { \sqrt { 10 } + \sqrt { 11 } } + \frac { 1 } { \sqrt { 11 } + \sqrt { 12 } } + \frac { 1 } { \sqrt { 12 } + \sqrt { 13 } } = \frac { 3 } { \sqrt { 10 } + \sqrt { 13 } }\).