The first five terms are -1, 1, -1, 1, -1. This sequence is not an arithmetic one because the differences between adjacent terms aren't equal. This is a geometric sequence with the common ratio -1.
The first five terms are -1, 1, -1, 1, -1. This sequence is not an arithmetic one because the differences between adjacent terms aren't equal. This is a geometric sequence with the common ratio -1.
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