Sequences (Edexcel GCSE Maths): Flashcards

Formula to calculate any term by substituting position number $n$

Find any term directly without listing all previous terms

Sequence where same number is added/subtracted each time

Constant value added/subtracted between consecutive terms

Find the common difference

$dn + (a - d)$

Common difference

First term

Constant second difference between terms

$n^2$

Set nth term formula equal to that value

Must be a positive whole number

Check if $n$ is a positive whole number

Substitute first few values of $n$ to verify formula