To determine if the sequence is arithmetic, geometric, or neither:
1.Arithmetic Sequence:
Calculate the differences between consecutive terms:
2 - 1 = 1
2 - 2 = 0
4 - 2 = 2
8 - 4 = 4
The differences are 1, 0, 2, 4, which are not constant. Therefore, the sequence is not arithmetic.
2.Geometric Sequence:
Calculate the ratios between consecutive terms: