並前往https://math.ymhs.tyc.edu.tw/chenyan/TeaPlan108/Contns/1091/%E9%AB%98%E4%B8%80%E4%B8%8A/3.1%E5%A4%9A%E9%A0%85%E5%BC%8F%E7%9A%84%E9%81%8B%E7%AE%97%E8%88%87%E6%87%89%E7%94%A8(%E4%B8%8A%E8%AA%B2).pdf