< Reelle Ebene < Offener rationaler Kreis < Abschluss
Bestimme den
Abschluss
der Menge
T
=
U
(
0
,
1
)
∩
Q
2
{\displaystyle {}T=U{\left(0,1\right)}\cap \mathbb {Q} ^{2}}
in
R
2
{\displaystyle {}\mathbb {R} ^{2}}
.
Eine Lösung erstellen
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