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Math Help - Arithmetic Sequence ?

  1. #1
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    Arithmetic Sequence ?

    \frac{e}{2},0,-\frac{e}{2},-\frac{3e}{2}

    a_2-a_1=-\frac{e}{2}

    a_3-a_2=-\frac{e}{2}

    a_4-a_3=-\frac{3e}{2}-(-\frac{e}{2})=-\frac{2e}{2}=-e

    There seems to be problem with the common difference here. The sequence comes from the following study guide, example 4:

    College Algebra Tutorial on Arithmetic Sequences and Series

    It doesn't seem like this is an arithmetic sequence to me.
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  2. #2
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    Hi adkinsjr

    I agree with you that it's not an arithmetic progression. Maybe there's typo
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