| Exam Board | Edexcel |
|---|---|
| Module | C1 (Core Mathematics 1) |
| Session | Specimen |
| Marks | 3 |
| Paper | Download PDF ↗ |
| Mark scheme | Download PDF ↗ |
| Topic | Arithmetic Sequences and Series |
| Type | Sigma notation: arithmetic series evaluation |
| Difficulty | Easy -1.2 This is a straightforward arithmetic series summation requiring only the standard formula S_n = n/2(2a + (n-1)d) or S_n = n/2(first + last). The series is explicitly given in simple form, requiring minimal algebraic manipulation and direct application of a core C1 formula with no problem-solving insight needed. |
| Spec | 1.04g Sigma notation: for sums of series |
Calculate $\sum_{r=1}^{20} 5 + 2r$ [3]
\hfill \mbox{\textit{Edexcel C1 Q1 [3]}}