| Exam Board | AQA |
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| Module | Paper 2 (Paper 2) |
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| Year | 2021 |
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| Session | June |
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| Topic | Arithmetic Sequences and Series |
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3 A sequence is defined by
$$u _ { 1 } = a \text { and } u _ { n + 1 } = - 1 \times u _ { n }$$
Find \(\sum _ { n = 1 } ^ { 95 } u _ { n }\)
Circle your answer.
\(- a\)
0
\(a\)
95a