osittaissummaa
Osittaissummaa is a Finnish term that translates to "partial sum" in English. It refers to the sum of a finite number of terms of a sequence or series, starting from the beginning of the sequence. For example, if you have a sequence denoted by a1, a2, a3, ..., then the first partial sum (S1) is simply a1. The second partial sum (S2) is a1 + a2. The third partial sum (S3) is a1 + a2 + a3, and so on. The nth partial sum (Sn) is the sum of the first n terms: a1 + a2 + ... + an.
The concept of partial sums is fundamental in the study of infinite series. By examining the behavior