In an arithmetic sequence we have a common difference (d).
Common difference: The common difference is the difference between two numbers in an arithmetic sequence.
So let us find common difference for the given sequence:
3, 4.5,6,7.5
Here first term is 3,
second term is 4.5
Difference = second term - first term = 4.5 - 3 = 1.5
third term is 6,
Difference = third term - second term = 6- 4.5 = 1.5
So common difference is 1.5
So we can say that the given sequence is an arithmetic sequence.
