Guys please help A= {{1} ,2,3,4} what does it mean.
I mean does {1} belong to A and is it a subset please answer whatever u know to make me understand !!!
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Yes, {1} belongs to A and it is a subset of A.
It is quite simple, actually.
See, Here {1} is a subset of A but if a question is raised whether 1 belongs to A or not so the Answer would be No because 1 simply doesn't belong to A but {1} belongs to A
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