圖片參考：http://img221.imageshack.us/img221/4697/singularsol.png
我知道通常set左condition(x≠0)的時候會sub番x=0入去,
跟住就話.. xxx is true so x=0 is a solution, but since it cant even be sub into the general sol. it is a singular sol
其實咁做有乜謂...!? 仲有上圖係(x≠0, y≠0)咁我要點搵singular sol? 謝謝喔!*
更新1:
唔明..點解要假設C= -∞ 仲有呢..(x≠0)係咪condition之一? 唔該晒~
