x^2*y'' + xy' + 9y = 0
請問此題該如何使用Cauchy–Euler equation求出general solution?
已知答案為y=c1cos(3lnx)+c2sin(3lnx)
收錄日期: 2021-04-30 19:16:37
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20141118000015KK00280