[理工] [工數] 二階ODE
題目：
y'' + 4y = 2 cos^2 x , y(0)=y'(0)= 0
完全卡住 沒頭緒= =
懇請高手指點~~~
謝謝
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 1.160.169.133
※ 編輯: Dieselcan 來自: 1.160.169.133 (05/23 21:59)
推
05/23 22:01, , 1F
05/23 22:01, 1F
推
05/23 22:01, , 2F
05/23 22:01, 2F
→
05/23 22:06, , 3F
05/23 22:06, 3F
推
05/23 22:11, , 4F
05/23 22:11, 4F
→
05/23 22:21, , 5F
05/23 22:21, 5F
推
05/23 22:24, , 6F
05/23 22:24, 6F
→
05/23 22:30, , 7F
05/23 22:30, 7F
→
05/23 22:31, , 8F
05/23 22:31, 8F
→
05/23 22:39, , 9F
05/23 22:39, 9F
討論串 (同標題文章)