1. dy/dx = (2x + y)/(x + 3y)
2. e^(x+y) *dy/dx + x(e^y + 4) = 0
收錄日期: 2021-04-24 10:16:54
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20141030000051KK00019