An arithmetic series is defined by its first term p p\,p and its common difference qqq.
Prove that the sum of the first n n\,n terms of this series is
12n[2p+(n−1)q] \frac{1}{2}n[2p + (n-1)q] 21n[2p+(n−1)q]Practise Edexcel A Level Maths 3.2 Arithmetic Series with exam-style questions for A Level Maths. 38 questions, matched to the Edexcel A Level Maths (9MA0) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.