😃8.3 二變數函數的線積分

https://www.geogebra.org/m/d7hnwvg8

https://www.geogebra.org/m/ensngr9a#material/n4xuqjvn

https://www.geogebra.org/m/WCXTg3t2

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

例1的圖解

習題 1 的圖解

https://www.geogebra.org/m/PkWm7UmZ