| Exam Board | AQA |
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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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| Marks | 1 |
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| Topic | Sequences and Series |
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3
Given \(u _ { 1 } = 1\), determine which one of the formulae below defines an increasing sequence for \(n \geq 1\)
Circle your answer.
[0pt]
[1 mark]
\(u _ { n + 1 } = 1 + \frac { 1 } { u _ { n } } \quad u _ { n } = 2 - 0.9 ^ { n - 1 } \quad u _ { n + 1 } = - 1 + 0.5 u _ { n } \quad u _ { n } = 0.9 ^ { n - 1 }\)