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Thread: summation notation

  1. October 1st 2009, 06:22 AM #1
    LovesMeTrike
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    summation notation

    How would I go about writing 1/2-1/3+1/4-1/5+1/6 in summation notation?
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  2. October 1st 2009, 06:24 AM #2
    pomp
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    Quote Originally Posted by LovesMeTrike View Post
    How would I go about writing 1/2-1/3+1/4-1/5+1/6 in summation notation?

    \sum_{n=2}^6 \frac{(-1)^n}{n}

    The (-1)^n term gives the alternating signs.
    Last edited by pomp; October 1st 2009 at 06:24 AM. Reason: latex
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