用matlab解微分方程y=dsolve('D2y+Dy-2y=2x','y(0)=0,Dy(0)=1','x')为什么

为什么在matlab中y=dsolve('5*(1-x)*D2y=sqrt+Dy*Dy)','y(0)=0,Dy(0)= Matlab求常微分方程为什么错误 dsolve('Dy=-2x*y/(x^2+2*a)') >> MATLAB中Y=dsolve('int(sqrt(1+(Dy)^2=Dy*(1-x)+y))','y(0)=0, matlab求解常微分y=dsolve('D3y-3*D2y-Dy*y=0','y(0)=1 Dy(0)=-1 D2y( 用matlab解常微分方程,调用dsolve是老出错 y=dsolve('Dy=x*sin(x)/cos(y)','x' 用matlab解：y=dsolve('D2y+exp(-t)*Dy-sin(sqrt(t))*y=exp(-t)*sin 常微分方程 解dy/dx + y - x^2=0 急.用matlab解非常系数的非分方程数值解.56.1*x*D2y+56.1*Dy+56.626*y=0 matlab（1-x）*y''=0.2*sqrt(1+y'^2) 输入y=dsolve('(1-x)*D2y-0.2*s matlab ode45求解微分方程 D2y-0.01*Dy.^2+2*y=sin(t), 求解微分方程 2ydx+(y^3-x)dy=0 微分方程 dy/dx=(-2x)/y