In (1+ax)n(1+ax)^n(1+ax)n, the coefficient of x x\,x is 12 and the coefficient of x2 x^2\,x2 is 60, where n n\,n is a positive integer greater than 2. Find a a\,a and nnn.
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Markscheme
1.3 Sequences and series Questions
107 exam-style questions on CCEA A Level Maths 1.3 Sequences and series, covering 1.3.1 Sequences and series and 1.3.2 Sequences and series. Each one has a worked solution and a mark scheme showing where the marks go.