課程名稱︰工程數學一
課程性質︰必修
課程教師︰謝傳璋
開課學院:工學院
開課系所︰工程科學與海洋工程學系
考試日期(年月日)︰2008/10/23
考試時限(分鐘):120
是否需發放獎勵金:是
(如未明確表示,則不予發放)
試題 :
1. Find the general solution of the following equations:
(i) y'-3xy = 6 10%
2 2
(ii) 2xyy'-y + x = 0 10%
3 2 2 3
(iii) (x +3xy )dx+(3x y+y )dy = 0 10%
2
(iv) y'+ y = y (Bernoulli equation) 10%
2
(v) x y'' -3xy' + 4y = 0 (Euler-Cauchy Equation) 10%
2. Find the orthogonal trajectories of the curves:
2
y = cx 15%
3. Find the general solution of
2 -3x
(D + 6D + 9)y = 16e 15%
4. Use the complex method to find the particular solution of the
equation :
.. .
m y + c y + ky = F sinωt 20%
0
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