| Exam Board | WJEC |
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| Module | Further Unit 1 (Further Unit 1) |
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| Year | 2024 |
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| Session | June |
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| Topic | Sequences and series, recurrence and convergence |
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5. Given that
$$\sum _ { r = k } ^ { 76 } ( r - 31 ) = 980$$
show that there are two possible values of \(k\).
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