並前往https://sbasa.rcpet.edu.tw/sbasa/examples_J/math/%E4%B8%83%E5%B9%B4%E7%B4%9A%E7%A4%BA%E4%BE%8B/02%E7%A9%BA%E9%96%93%E8%88%87%E5%BD%A2%E7%8B%80/%E7%B5%84%E5%90%88%E7%AF%84%E4%BE%8B-%E7%B7%9A%E5%B0%8D%E7%A8%B1%E8%88%87%E4%B8%89%E8%A6%96%E5%9C%96.pdf