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Math Help - Recursive Project

  1. #1
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    Recursive Project

    Please help with the following problem!

    Come up with a recursive definition of the sum Σ (from j=m to n) of x-sub-j for two integers m <= n.

    Thanks a lot!
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  2. #2
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    So, that is
     \sum_{j=m}^n x_j .

    Well, we see that if  S_n = \sum_{j=1}^n x_j, then  \sum_{j=m}^n x_j = S_m - S_n and each S_n = S_{n-1} + x_n .

    Other than that the question is very vague.
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