Question

what's this sign stands for

Answer 1

this means n "belongs to" N (Natural Numbers)

This sign stands for "belongs to"

Answer 2

Answer :

The question is -
"What does the sign '∈' stand for?"

Well, '∈' means 'belongs to'.

Here, n ∈ N means - n belongs to the set of Natural numbers.

If the sign is like this '∉'; it will mean 'does not belong'.

Like, k ∉ N, meaning k does not belong to the set of Natural numbers.

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