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Math Help - Arithmetic Series Help!?

  1. #1
    MP3
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    Arithmetic Series Help!?

    Hi im having a few problems on this question, may anyone help me?

    1. For each series, calculate t10

    2+10+18+26+..........

    thank you
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  2. #2
    MHF Contributor
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    Quote Originally Posted by MP3 View Post
    Hi im having a few problems on this question, may anyone help me?

    1. For each series, calculate t10

    2+10+18+26+..........

    thank you

    Use the arithmetic summation formula where a=2 , d=8 . Calculate T_{10} by plugging the values in .

    T_{10}=S_{10}-S_9
    Last edited by mathaddict; May 17th 2009 at 12:20 AM.
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  3. #3
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    Quote Originally Posted by MP3 View Post
    Hi im having a few problems on this question, may anyone help me?

    1. For each series, calculate t10

    2+10+18+26+..........

    thank you
    An arithmetic sequence has the formula:

    U_n = a + (n-1)d

    where
    • U_n is the nth term
    • a = U_1 is the first term
    • n number of terms
    • d is the common difference


    In your case the common difference is 18-10 = 8
    The first term is 2
    the number of terms is 10

    Sub those in and solve
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