IGCSE Maths Specification

Edexcel A 4MA1

Section 3.1: Sequences

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#3.1A

generate terms of a sequence using term-to-term and position-to-term definitions of the sequence

Including odd, even, squares, multiples and powers

#3.1B

find subsequent terms of an integer sequence and the rule for generating it

5, 9, 13, 17, ... (add 4)

1, 2, 4, 8, ... (multiply by 2)

#3.1C

use linear expressions to describe the \(n\)th term of arithmetic sequences

1, 3, 5, 7, 9, ... \(n\)th term is \(2n - 1\)

\(n\)th term is \(4n + 3\), write down the first 3 terms of the sequence

#3.1D

understand and use common difference (\(d\)) and first term (\(a\)) in an arithmetic sequence

e.g. given 2nd term is 7 and 5th term is 19, find \(a\) and \(d\)

#3.1E

know and use \(n\)th term \(= a + (n-1)d\)

#3.1F

find the sum of the first \(n\) terms of an arithmetic series (\(S_n\))

e.g. given 4 + 7 + 10 + 13 + ... find sum of first 50 terms