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Zoe W.

asked • 01/25/18

What is the formula for the sequence -3,5,-7,9,-11...

Find a formula for sn for n>1, for the sequence -3, 5, -7, 9, -11 ...

1 Expert Answer

By:

Mark M.

Sn represents the sum of the series.
You present, correctly, the recursive definition for an.
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01/25/18

Bobosharif S.

tutor
Thank you for comment.
{sn} is a sequence. There is no summation. (It doesn't change meaning if you denote by  sn or an). The question doesn't ask about limit(s) either, though it is clear that sn itself has no limit. But it subsequences s2n or s2n-1 might have.
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01/25/18

Mark M.

A difference in nomenclature, in my studies Sn is a summation (series), which an represents a specific term. I assumed that the Sn in the posting was the former.
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01/25/18

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