# Past Papers’ Solutions | Edexcel | AS & A level | Mathematics | Core Mathematics 1 (C1-6663/01) | Year 2008 | January | Q#11

Question The first term of an arithmetic sequence is 30 and the common difference is –1.5. a. Find the value of the 25th term. The rth term of the sequence is 0. b. Find the value of r. The sum of the first n terms of the sequence is Sn. c. Find the largest positive value of […]