In: Advanced Math
Prove that step by step and clear handwritten. Follow the comment
Conception: Limit point
1.Prove N'=empty
2.Prove Q'=R
3. E=(2,5), E'=[2,5] my question is that why the collection limit point of E includes 2 and 5? obviously, 2 and 5 are not in E. If they can be limit point in E does that mean R can be all set's collection of all limit point? such as R'=R, Q'=R, N'=R???