3.1 Arithmetic Sequences

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A sequence $a_1, a_2, a_3, \dots\,$ is defined by

\begin{aligned}a_1 &= 15 \\a_{n+1} &= a_n + d, \quad n \geq 1\end{aligned}

Given $a_4 = 6$

Find the value of $d$ .

[3]

Find an expression for $a_n\,$ in terms of $n$ .

[2]

3.1 Arithmetic Sequences Questions

Practise Edexcel A Level Maths 3.1 Arithmetic Sequences with exam-style questions for A Level Maths. 6 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.