The first three terms of an arithmetic series are (2x−3)(2x-3)(2x−3), (5x−2)(5x-2)(5x−2) and (10x−7)(10x-7)(10x−7) respectively.
Find the value of the constant xxx.
Find the sum of the first 25 terms of the series.
41 exam-style questions on AQA A Level Maths 1.7.4 Arithmetic sequences and series (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.