identify the sequence as arithmetic geometric or neither 3 4.5 6 7.5
1. arithmetic
2. 9, 15, 19.5
3. 5, 7, 9, 11
4. 4n
5. 80
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3+1.5=4.5
4.5+1.5=6
6+1.5=7.5
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Since each subsequent number can be found simply by adding a constant to the previous number, the sequence is, by definition, an arithmatic progression
3 + 1.5 = 4.5
4.5+1.5 = 4
6 + 1.5= 7.5
Now which kind of a sequence is that ?