展开全部
let
u=y'
du/dy = d/dy (y') = d/dx(y') . (dx/dy) = y''/y'
y''= u. du/dy
y.y''= (y')^2
y.(u. du/dy) = u^2
∫du/u = ∫dy/y
ln|u| = ln|y| +C'
u= C1.y
dy/dx = C1.y
∫dy/y =∫ C1.dx
ln|y| = C1.x + C2'
y =C2. e^(C1.x)
u=y'
du/dy = d/dy (y') = d/dx(y') . (dx/dy) = y''/y'
y''= u. du/dy
y.y''= (y')^2
y.(u. du/dy) = u^2
∫du/u = ∫dy/y
ln|u| = ln|y| +C'
u= C1.y
dy/dx = C1.y
∫dy/y =∫ C1.dx
ln|y| = C1.x + C2'
y =C2. e^(C1.x)
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询