Higher January 2019 Paper 2 Q2
2 Here are the first five terms of an arithmetic sequence.
7 11 15 19 23
Write down an expression, in terms of \(n\), for the \(n\)th term of this sequence.
(2)
| Scheme | Marks |
|---|---|
| \(4n + 3\) | B2oe |
| (2) | |
| (2 marks) |
Notes
B2oe: e.g. \(7 + 4(n - 1)\) or \(4n + (7 - 4)\) etc
allow \(T_n = 4n + 3\) or \(x = 4n + 3\) etc
If not B2 then award B1 for answer of \(4n + k\) (\(k \ne 3\)) or \(n = 4n + 3\)