Question

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 !!!

Answer 1

Answer:

yes A = (1 , 2, 3 , 4) there can be multi , division , addition , subtraction between this 4 number to make it as A , hope this helps :)

Explanation:

Answer 2

it means that {1} ∈ A

that is, {1} is an element of A.

{{1}} is a subset of A.

but {1} isn't a subset of A, as 1 isn't an element of A. only {1} is an element of A.