| Exam Board | OCR MEI |
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| Module | Paper 3 (Paper 3) |
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| Year | 2023 |
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| Session | June |
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| Topic | Sequences and series, recurrence and convergence |
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13 Prove that Euler's approximate formula, as given in line 13, when applied to \(\sum _ { \mathrm { r } = 1 } ^ { \mathrm { n } } \mathrm { r } ^ { 2 }\) gives exactly \(\frac { n ( n + 1 ) ( 2 n + 1 ) } { 6 }\).