| Exam Board | OCR MEI |
|---|---|
| Module | C2 (Core Mathematics 2) |
| Year | 2015 |
| Session | June |
| Marks | 5 |
| Paper | Download PDF ↗ |
| Mark scheme | Download PDF ↗ |
| Topic | Arithmetic Sequences and Series |
| Type | Find term or common difference |
| Difficulty | Easy -1.2 This is a straightforward application of arithmetic sequence formulas with no conceptual challenges. Students simply substitute given values into a₁₀ = a + 9d and a₅₀ = a + 49d, solve the resulting simultaneous equations, then apply the standard sum formula. It's more routine than average A-level questions which typically require multiple techniques or some problem-solving insight. |
| Spec | 1.04h Arithmetic sequences: nth term and sum formulae |
3 An arithmetic progression has tenth term 11.1 and fiftieth term 7.1. Find the first term and the common difference. Find also the sum of the first fifty terms of the progression.
\hfill \mbox{\textit{OCR MEI C2 2015 Q3 [5]}}