作者wil0829ly (汪汪)
看板Grad-ProbAsk
標題[理工] [工數]-ODE
時間Fri Apr 16 21:48:29 2010
Let the scalar functions x (t) and x (t)
1 2
be two different solutions of the following differential equation
sint x" + cost x' + t = 5 ,then is 3x (t)+7x (t)
1 2
also a solution? Please prove your answer mathematically.
A simple yes or no answer is not credited.
這題要怎麼解呢
沒看過係數是三角的= =
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 118.165.24.50
→ kagato:(sinx')' = (5-t) 04/16 21:51
→ kagato:對不起= =, (sint x')' = (5-t) 04/16 21:52
→ wil0829ly:摁摁 我算算看~ 04/16 21:53
→ wil0829ly:徵求高手幫解... 04/16 22:13
推 squallting:這題他沒有要你解阿 他只是問3x1+7x2也是不是解而已 04/16 22:31
→ wil0829ly:摁 我知道 但是要怎麼證呢 04/16 22:33
推 ntust661:錯 04/17 01:23
→ ntust661:因為它是非齊性ODE 04/17 01:23
→ ricky764:K大自從放榜就鬆了不少((溜 04/17 01:38