lexiconkabir:
set A = {(x,y)£R² : x² + y² ≤ 1}, what are the limit points of A?

here is what i did;

obviously, thats a unit disk(closed) centred at the origin, so drawing a disk on the rectangular coordinate using that radius, i found out that the neighborhood of (x,y) intersecting with A gives the whole of the disk, so the limit points (x,y) should be in [-1 , 1]....

I need a verification, thanks!

snapscore:
Don't you think posting it in the education section might be better?