[理工] [工數]-元智97-能源所
http://web2.yzu.edu.tw/library/collections/exam/97G/G970051.htm
我要問第一題
他說要用參數變換法來解ODE
我先乘上X^2變成Cauchy Euler解齊性解 然後令Yp代入
求出來的答案是 y=C1X^4+C2X+(㏑X/3)X^4-(1/2)X^2
我怎麼覺得好像怪怪的...
可否請各位板友指點指點~
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