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Math Help - arithmetic progression--need help 2

  1. #1
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    arithmetic progression--need help 2

    the sum of the first four terms of an arithmetic sequence is 58. and the sum of the next four terms is twice that number. find the sum of the following four terms.
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  2. #2
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    Re :

    Quote Originally Posted by nikk View Post
    the sum of the first four terms of an arithmetic sequence is 58. and the sum of the next four terms is twice that number. find the sum of the following four terms.
    S_4=58

    S_8-S_4=2(58)

    S_{12}-S_8=Ans .
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  3. #3
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    Quote Originally Posted by mathaddict View Post
    S_4=58

    S_8-S_4=2(58)

    S_{12}-S_8=Ans .
    tq for the help
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