Foundation June 2025 Paper 3 Q20
20 A linear sequence has
- 2nd term = 6
- 5th term = 18
Work out the \(n\)th term of the sequence. [3 marks]
| Answer | Mark | Comments |
|---|---|---|
| \((18 - 6) \div 3\) or 4 | M1 | oe implied by 10 and 14 |
| \(4n - 2\) | A2 | oe A1 for \(4n + c\) oe |
Additional guidance
| Condone use of \(N\) or other variables | |
| Condone \(n = 4n - 2\) | M1A2 |
| \(4n + -2\) | M1A1 |
| \(4n\) may be seen as \(4 \times n\) or \(n \times 4\) or \(n4\) for M1A1 but not M1A2 | |
| \(n + 4\) | M1A0 |