Question

defination of sigma and the use of sigma


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Answer 1

Answer:

Sigma is the 18th letter of the Greek alphabet and is equivalent to our letter 'S'. In mathematics, the upper case sigma is used for the summation notation. The lower case sigma stands for standard deviation. ... Neither of them looks like our letter 'S', but they are both the Greek equivalent of it

Answer 2

Answer:

Sigma is the name of the 18th letter of the Greek alphabet, Capital sigma is written as Σ;

Uses :

The symbol Σ (sigma) is generally used to denote a sum of multiple terms. This symbol is generally accompanied by an index that varies to encompass all terms that must be considered in the sum.

For example, the sum of first whole numbers can be represented in the following manner: 1 2 3 ⋯.

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