Which one of these points is accumulation point, which not and why? I read the definition x-times but I'm quite confused :-/ I also found this post which is relevant to my question but it seems to me strange.
The problem is with natural numbers and what is epsilon? Real or natural?
Lets see the problem:
$A=\{\frac{1}{n}; n\in\mathbb{N}\}$
- $0.999999...$
- $0$
- $1$
- $10$