😃6.1 矩陣的定義與運算

https://www.geogebra.org/m/daz9grnr#material/qupws8qz

https://www.geogebra.org/m/daz9grnr#material/w9czpbut

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

https://www.geogebra.org/m/daz9grnr#material/cgvhngb5

https://www.geogebra.org/m/ndk7kxhv

https://www.geogebra.org/m/Thnmhe5T