並前往https://math.ymhs.tyc.edu.tw/chenyan/TeaPlan108/Contns/1091/%E9%AB%98%E4%B8%80%E4%B8%8A/3.3%E5%A4%9A%E9%A0%85%E5%BC%8F%E5%87%BD%E6%95%B8%E5%9C%96%E5%BD%A2%E8%88%87%E5%A4%9A%E9%A0%85%E5%BC%8F%E4%B8%8D%E7%AD%89%E5%BC%8F(%E4%B8%8A%E8%AA%B2)%E5%AD%B8.pdf