😃1.1 實數

數系

https://www.geogebra.org/m/tsw73wwa

https://www.geogebra.org/m/ffbtqva2

https://www.geogebra.org/m/JBrpvwXR

https://www.geogebra.org/m/kpnDNRTK

https://www.geogebra.org/m/Rv5xkXxh