What is sigma??????

1.	What is sigma??????
Answer» 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 ∑ is used as an operator for summation. When used at the END of a letter-case WORD, the final form is used.

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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 ∑ is used as an operator for summation. When used at the END of a letter-case WORD, the final form is used.

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What is sigma??????​

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What is sigma??????