Geometric Sequences (AQA A-Level Mathematics): Flashcards

A sequence with a common ratio between consecutive terms

Divide a term by its previous term

First term

Common ratio

$u_n = ar^{n-1}$

$S_n = \frac{a(1-r^n)}{1-r}$

$ar$

$ar^2$

$2$

$\frac{1}{2}$