1. x+2y/xy=2x+y
2.(x^2+y^2)^4
唔識d呢類型(implicit functions)
收錄日期: 2021-04-25 17:19:19
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080208000051KK01252