# Past Papers’ Solutions | Edexcel | AS & A level | Mathematics | Core Mathematics 1 (C1-6663/01) | Year 2005 | January | Q#5

Question The rth term of an arithmetic series is (2r – 5). a. Write down the first three terms of this series. b. State the value of the common difference. c. Show that Solution a. We are given that rth term of arithmetic series is represented by; Therefore, to find any term k we substitute […]