I’ve seen many different summations that are solved by the upper bound minus the lower bound plus one.
For example:
$$ \sum_{i=1}^{n} {1} = n-1+1 $$
May I always resolve summations in this way or are there any exceptions/restrictions?
2026-03-25 04:35:16.1774413316
Solving summations by upper bound - lower bound + 1
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