How do you determine if -10,20,-40,80 is an arithmetic or geometric sequence?
The sequence is a geometric sequence.
- In an Arithmetic sequence there is a common difference
#d#between any two consecutive terms
- In a Geometric sequence there is a common ratio
#r#for any two consecutive terms
The sequence given is :
1) Checking if the sequence is an arithmetic sequence:
2) Checking if the sequence is a geometric sequence:
So the sequence is a geometric sequence.