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The topic partial sum is discussed in the following articles:
...an, which involves adding only the first n terms, is called a partial sum of the series. If sn approaches a fixed number S as n becomes larger and larger, the series is said to converge. In this case, S is called...
...(1)continuing forever. This particular series is relatively harmless, and its value is precisely 1. To see why this should be so, consider the partial sums formed by stopping after a finite number of terms. The more terms, the closer the partial sum is to 1. It can be made as close to 1 as desired by including enough terms. Moreover, 1 is...
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