Re: [理工] [工數] ODE!!!一求解~~
看板Grad-ProbAsk作者honestonly (感冒了~哭哭)時間14年前 (2010/03/11 21:50)推噓10(10推 0噓 12→)留言22則, 12人參與討論串2/2 (看更多)
※ 引述《topee (eason)》之銘言：
: 題目:
: find the solution of equation
: dy 2y-x
: --- = -------
: dx 2x-y
: 2xdy - 2ydx + xdx -ydy = 0
: 我看不太出來!!
這樣子算 是不是可行的呀? 想問問而已orz
dy dx d(x+y) d(x-y)
---- = ----- = -------- = --------
2y-x 2x-y x + y 3x-3y
1
lnc(x+y) = --- ln(x-y)
3
這樣子可行嗎??
--
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03/11 21:53, , 1F
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03/11 23:17, , 22F
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