Maths Dictionary · SS 2
Geometric progression (GP)
Also called: geometric sequence
Simple meaning
A sequence where you multiply by the same number each time.
Example
2, 6, 18, 54, … (multiply by 3 each time).
See it
From the Geometric Progression lesson. Try moving things around.
Each bar = the bar before × 3
T4 = a × r3 = 2 × 33 = 2 × 27 = 54
Sum of the first 4 terms: S4 = 80
Term number n4
First term a2
Common ratio r3