👉 In mathematics, a summand is a component of a mathematical expression that represents an amount or value. Summation is a method used to add up all the values in a series of numbers. For example, consider the following arithmetic sequence: 1 + 2 + 3 + ... + n This sequence consists of n terms, and each term is the sum of the previous term (in this case, 1) and twice the previous term. The sum of the first n terms of