Question

defination of sigma and the use of sigma​
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Answer 1

Sigma is used for summation (addition)

For example:

if Forces F¹, F², F³ are acting on a body then sum of all the forces will be:

ΣF = F¹ + F² + F³

Answer 2

Answer:

hi Sigma is a greek letter

Step-by-step explanation:

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