Geometric sequence


A number pattern in which there is a common ratio between successive terms.


Example


1

2

4

8

16


Here the common ratio is 2


1

x2

2

x2

4

x2

8

x2

16


Formula


You can find the nth term of a geometric progression using the formula



where r = common ratio.


Test the formula on the 3rd term of the example sequence

 


Related topics:

Number sequences

Arithmetic sequence