😃2.2 方程式的圖形

https://www.geogebra.org/m/g4bw52mc

圓的方程式https://www.geogebra.org/m/nXb87kYz

https://www.geogebra.org/m/PEUtyRH3

https://www.geogebra.org/m/dmg5pycw