討論串[理工] [工數]-微分方程
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( -x - y ) dx + ( x - y ) dy. P(x,y) Q(x,y). 1. P(λx,λy) = λ P(x,y). 1. Q(λx,λy) = λ Q(x,y). Homogeneous of degree one. 我猜他在問，是否有 F(x) 項 (不包含y的項次). 重點
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Classify each of the following differential equation by sating [成大機械]the order, whether the equation is homongeneous or non-homongeneous,. and it is l
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視為X(y)函數. 對y微分一次: X'=Acos(y+B) ... (1). 對y微分一次: X''=-Asin(y+B)... (2). (2) X''. ------= ----- = - tan(y+B)...(3). (1) X'. X=Asin(y+B) 同除cos(y+B) → X/c
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