本週影片主要涵蓋 1.numpy介紹 2.sympy 介紹 本週課程github連結: https://nbviewer.jupyter.org/github/yenlung/AI_Math/blob/master/04.%20%E6%95%B8%E5%AD%B8%E8%A8%88%E7%AE%97%E7%9A%84%E4%BA%8C%E4%B8%89%E4%BA%8B.ipynb
