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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So, that is $\displaystyle \sum_{j=m}^n x_j $. Well, we see that if $\displaystyle S_n = \sum_{j=1}^n x_j$, then $\displaystyle \sum_{j=m}^n x_j = S_m - S_n$ and each $\displaystyle S_n = S_{n-1} + x_n $. Other than that the question is very vague.
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