dy/dx=√(2*(y^3/3+0.9711-y)) 如何用matlab求解出不定积分用desolve求解的话会出现以下几个问题1.>> dsolve('Dy=(2*(y^3+1-y+0.9711))^0.5')Warning:Explicit solution could not be found; implicit solution returned.> In dsolve at 310an

反函数的二阶导数疑问设dy/dx=y',则dx/dy=1/y',应视为y的函数则d2x/dy2=d(dx/dy)/dy（定义）=d(1/(dy/dx)) / dy=d(1/(dy/dx))/dx * dx/dy（复合函数求导,x是中间变量）=-y''/(y')^2 * (1/y')=-y''/(y')^3d(1/(dy/dx))/dx * dx/dy 已知y=sinx^2求dy/dx^3 dy/dx^4要详细过程 dy/dx=2y/x+3x/2y （-2x-y+9)dy=(-y+x+3)dx dy/dx+3y=8 通解 微分方程 dy/dx=(e^y+3x)/x^2 微分方程求解 (x^2y^3+xy)dy=dx 解微分方程 (x^2y^3+xy)dy=dx x^2+xy+y^3=1,求dy/dx dy/dx=(x+y^3)/(xy^2) 微分方程求解 (x^2y^3+xy)dy=dx dy/dx=3x+2y+1解微分方程 dy/dx=(x+y^3)/xy^2 常微分方程dy/dx=(x^3+xy^2)/y 解微积分方程,dx分之dy+3y=2 2*x*y^2（dy／dx）- x^3（dy／dx）=2y^3求其通解 (x^2)dy+（y^2)dx=dx-dy 微分方程d^2y/dx^2-2dy/dx-3y=0的通解