Arithmetic Sequence ?

**adkinsjr** · September 28th 2009, 09:35 AM

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

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

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

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

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.

**songoku** · September 28th 2009, 06:02 PM

Hi adkinsjr

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

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