並前往https://math.ymhs.tyc.edu.tw/masterchen/chenyan/TeaPlan107/TeaPnCon/105SB1/CH2/105%E4%B8%8A%E5%9C%8B%E4%B8%80Ch2.1%E5%9B%A0%E6%95%B8%E8%88%87%E5%80%8D%E6%95%B8(%E4%B8%8A%E8%AA%B2).pdf