求解微分方程x''-1/t*x'+(x')^2=0
求解微分方程x''-1/t*x'+(x')^2=0
數(shù)學人氣:443 ℃時間:2020-06-15 14:54:04
優(yōu)質解答
令t=e^z,則tx'=dx/dz,t²x''=d²x/dz²-dx/dz代入原方程,化簡得d²x/dz²-2dx/dz+(dx/dz)²=0.(1)令dx/dz=p,則d²x/dz²=dp/dz代入方程(1),化簡得[1/p+1/(2-p)]dp=2dz==>ln│p│-ln...
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