並前往http://shann.idv.tw/calculus/text/2-06%E8%87%AA%E7%84%B6%E5%B0%8D%E6%95%B8%E8%88%87%E4%B8%80%E8%88%AC%E6%8C%87%E6%95%B8%E7%9A%84%E5%BE%AE%E5%88%86.pdf
