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Tuesday, September 12, 2006

Tuesday, September 12,2006
Lesson ll.4
Today we learned how to evaluate an arithmetic series.
We also learned to write and evaluate an arithmetic series in Sigma (Summation) Notation.

If you are at the site tonight and want to summarize this lesson, you may do so. Perhaps someone who hasn't done a summary yet will volunteer.

See you tomorrow.
Mrs. S.

posted by Mrs. S. at 3:12 PM

2 Comments:

  • Hey Brittany,
    It's Wed. night. I hope you are understanding the sigma problems better after today's class. The number on top of the greek letter sigma represents the total number of terms in the series. We call the top number the "upper limit" and the bottom number the "lower limit".

    To find n, the total number of terms in the series, we say "upper limit - lower limit + 1"

    To evaluate a sigma notation problem, we must find n, asub1, and asubn.

    asub1 is found by subbing the lower limit (bottom number) into the formula given to the right of the greek letter sigma.

    asubn is found by subbing the upper limit (top number) into the formula given to the right of the greek letter sigma.

    Once you find these three values, you sub them in to the Ssubn formula for an Arithmetic sequence.

    Good luck! let me know if you need more help.
    Mrs. S

    By Blogger Mrs. S., at 5:12 PM  

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    By Blogger Mrs. S., at 5:12 PM  

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