並前往https://math.ymhs.tyc.edu.tw/chenjt99/ScrClass/1041/%E7%BF%92%E4%BD%9C/%E9%AB%98%E4%B8%80%E4%B8%8A/%E7%BF%92%E4%BD%9C%E7%94%B2/2-3%20%E5%A4%9A%E9%A0%85%E5%BC%8F%E6%96%B9%E7%A8%8B%E5%BC%8F(%E7%BF%92%E4%BD%9C%E7%94%B2).pdf