Question

what is the meaning of this symbol in math sets ?
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Answer 1

Step-by-step explanation:

The symbol ∈ indicates set membership and means “is an element of” so that the statement x∈A means that x is an element of the set A. In other words, x is one of the objects in the collection of (possibly many) objects in the set A.

Answer 2

Answer:

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Step-by-step explanation:

its sigma