並前往http://msvlab.hre.ntou.edu.tw/grades/Engineering-Mathematics-100-2/FOURIER/fourier(2)/%E5%B8%B8%E6%85%8B%E5%88%86%E5%B8%83%E5%87%BD%E6%95%B8%E8%88%87%E5%82%85%E7%AB%8B%E8%91%89%E8%BD%89%E6%8F%9B.pdf
