- #1
Ka Yan
- 27
- 0
I'm a new comer, even in Math. I need hands for this (simple, may be for most people) question:
Can a subset of Rational Number Set be open (and closed)? If does, how can it be? If not,why?
thks!
Ka Yan
Can a subset of Rational Number Set be open (and closed)? If does, how can it be? If not,why?
thks!
Ka Yan
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