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Math Help - Arithmetic progression

  1. #1
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    Arithmetic progression

    In an arithmetic progression,the fourth term is 8 and the sum of the first 12 terms is 156.determine the sum of the second 10 consecutive terms..

    i get the first term and common difference is:

    a=2

    d=2
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  2. #2
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    Quote Originally Posted by mastermin346 View Post
    In an arithmetic progression,the fourth term is 8 and the sum of the first 12 terms is 156.determine the sum of the second 10 consecutive terms..

    i get the first term and common difference is:

    a=2

    d=2
    compute S_{20} - S_{10}

    dd
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