How do you determine whether the sequence #9, -6, 4, -8/3,...# is geometric and if it is, what is the common ratio?
It is a geometric sequence and common ratio is
To find whether a given sequence is geometric sequence or not, we should divide each term by its preceding term to find ratio between them.
If we get the same ratio, it is a geometric sequence.
Here, we are given the sequence as
As ratio is same, it is a geometric sequence and common ratio is