如題 :solve y'' - 4y' +4y =2x =6(e^3x)
given y(0) =6 , y'(0) =18
收錄日期: 2021-04-11 19:38:01
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20130311000051KK00239