The third sequence. Β
Step-by-step explanation:
In an arithmetic sequence, the difference between two consecutive terms is the same.
For each option, find the difference between consecutive terms:
First option:
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The differences are not the same. As a result, this option is not an arithmetic sequence.
Second option:
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The differences are not the same. As a result, this option is not an arithmetic sequence, either.
Third option:
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The differences are all . As a result, this option is indeed an arithmetic sequence. Its common difference is .
Fourth option:
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The differences are varying between and . As a result, this option is not an arithmetic sequence.