| Exam Board | AQA |
|---|---|
| Module | Paper 1 (Paper 1) |
| Year | 2018 |
| Session | June |
| Marks | 1 |
| Paper | Download PDF ↗ |
| Mark scheme | Download PDF ↗ |
| Topic | Sequences and Series |
| Type | Periodic Sequences |
| Difficulty | Easy -1.8 This is a straightforward recall question requiring recognition that sin(nπ/2) cycles through values 0, 1, 0, -1 with period 4. It's a multiple-choice question with minimal calculation, testing only basic understanding of periodic functions—significantly easier than average A-level questions. |
| Spec | 1.04f Sequence types: increasing, decreasing, periodic |
| Answer | Marks | Guidance |
|---|---|---|
| \(4\) | B1 | Circles correct answer |
## Question 3:
$4$ | B1 | Circles correct answer
---3 A periodic sequence is defined by $U _ { n } = \sin \left( \frac { n \pi } { 2 } \right)$\\
State the period of this sequence.
Circle your answer.\\
$82 \pi \quad 4 \quad \pi$
\hfill \mbox{\textit{AQA Paper 1 2018 Q3 [1]}}