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3.4 Sequences and Series (A-level only)

3.4 Sequences and Series (A-level only)

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Question 25

A sequence $u_1, u_2, u_3, \dots\,$ is defined by

$u_1 = 3$

$u_{n+1} = u_n + c$ , $\geq 1\,$

where $c\,$ is a constant.

It is given that $u_5 = 23$ .

a.

Find the value of $c$ .

[2]

b.

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

[2]

Markscheme

3.4 Sequences and Series (A-level only) Questions

A Level
Maths
3.4 Sequences and Series (A-level only)

231 exam-style questions on WJEC A Level Maths 3.4 Sequences and Series (A-level only), covering 3.4.1 Sequences and Series (A-level only), 3.4.2 Sequences and Series (A-level only), 3.4.3 Sequences and Series (A-level only), 3.4.4 Sequences and Series (A-level only), 3.4.5 Sequences and Series (A-level only), 3.4.6 Sequences and Series (A-level only), and 3.4.7 Sequences and Series (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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