# Summation (sum)

The sum of a sequence of numbers is the total value of all the numbers added together. In mathematical terms, it can be represented as:

sum = a1 + a2 + a3 + ... + an

where a1, a2, a3, ..., an are the numbers in the sequence.

The summation of a sequence of numbers can be used to calculate things like the mean, median, and mode of the sequence. It can also be used to calculate the variance and standard deviation.

### How do you use ∑?

The ∑ symbol (pronounced "sigma") is a mathematical symbol that represents the sum of a series of numbers. In order to use it, you must first identify the numbers that you want to add up, and then place the ∑ symbol before them. For example, if you wanted to add up the numbers 1, 2, and 3, you would write:

∑1, 2, 3

which would give you the answer 6. How do you find the sum of a summation? To find the sum of a summation, you need to add up all of the terms in the summation. This can be done by hand, or using a calculator. What does this mean ∑? This means that the sum of all the values in the set is being calculated. What is sum example? In mathematics, summation is the addition of a sequence of any kind of numbers, called addends or summands; the result is their sum or total. Given a sequence of numbers, summation is the term for the operation of adding them together. For example, the summation of the numbers 2, 3, and 4 is 2 + 3 + 4 = 9.

#### Is sum and add the same?

No, sum and add are not the same.

The sum function is used to add up a list of numbers, while the add function is used to add two numbers together.