並前往https://math.ymhs.tyc.edu.tw/masterchen/chenjt99/ScrClass/1081/%E9%AB%98%E4%B8%80/%E5%9F%BA%E7%A4%8E%E7%B7%B4%E7%BF%92%E9%A1%8C%E6%9C%AC/108%E9%AB%98%E4%B8%80%E7%B7%B4%E7%BF%926%E5%9B%9E.pdf