Summation equation

A summation equation is a mathematical expression that represents the sum of a sequence of terms, typically defined by an index. The summation notation uses the Greek letter sigma (Σ) to denote the sum. The general form of a summation equation is: \[ \sum_{i=a}^{b} f(i) \] Where: - \( \sum \) is the summation symbol. - \( i \) is the index of summation.