並前往https://math.ymhs.tyc.edu.tw/masterchen/chenyan/TeaPlan107/TeaPnCon/106SB3/CH2/Ch2.2%E6%A0%B9%E5%BC%8F%E7%9A%84%E9%81%8B%E7%AE%97(%E4%B8%8A%E8%AA%B2).pdf
