Question

What is Sigma ??????​

Answer 1

Answer:

Sigma is the eighteenth letter of the Greek alphabet. In the system of Greek numerals, it has a value of 200. In general mathematics, uppercase Σ is used as an operator for summation. When used at the end of a letter-case word, the final form is used.

Answer 2

• The Greek letter Sigma is the eighteenth letter. It has a numerical value of 200 in the Greek number system.
• The operator for summation in general mathematics is uppercase.
• The final form () is used at the end of a letter-case (non-all-caps) word.
• The two lowercase sigmas () in the middle of the name (Odysseus), for example, are distinct from the word-final sigma ().