Foundation June 2023 Paper 1 Q19
19 Here are the first five terms of an arithmetic sequence.
\[-5 \qquad 3 \qquad 11 \qquad 19 \qquad 27\]Find an expression, in terms of \(n\), for the \(n\)th term of this sequence. (2)
| Answer | Mark | Mark scheme |
|---|---|---|
| \(8n - 13\) | B2 | for \(8n - 13\) oe |
| (B1 | for \(8n + k\) where \(k \neq -13\) or is absent unambiguously shown) |
Additional guidance
Accept a different variable
eg \(8x - 13\)
\(n = 8n - 13\) or \(8n^{\text{th}} - 13\) gets B1 only