Step 1 :Determine whether each series is arithmetic, geometric, or neither.
Step 2 :In an arithmetic series, the difference between consecutive terms is constant.
Step 3 :In a geometric series, the ratio of consecutive terms is constant.
Step 4 :In this series, neither the difference nor the ratio is constant.
Step 5 :\(\boxed{\text{The series is neither arithmetic nor geometric.}}\)