Type of Sequence Arithmetic sequence. Common Difference: -2
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When a sequence is arithmetic, the difference between two consecutive terms is constant. By examining our sequence we can see that this is the case.
10 +( - 2) ⟶ 8 +( - 2) ⟶ 6 +( - 2) ⟶ 4 +( - 2) ⟶ ...
Therefore, the sequence is an arithmetic sequence with common difference - 2.