我求解一个微分方程出现问题坐等高手!y=dsolve('D2y+4*pi*13*0*Dy+4*pi^2*13^2*y=4*pi^2*13^2*[x-sin(2*pi*x)/(2*pi)]','y(0)=0','Dy(0)=0','x')但是提示?Errorusing==>dsolveTherearemoreODEsthanvariables.Errorin==>Untitled3at1

Question

我求解一个微分方程出现问题坐等高手!
y=dsolve('D2y+4*pi*13*0*Dy+4*pi^2*13^2*y=4*pi^2*13^2*[x-sin(2*pi*x)/(2*pi)]','y(0)=0','Dy(0)=0','x')
但是提示? Error using ==> dsolve
There are more ODEs than variables.
Error in ==> Untitled3 at 1
y=dsolve('D2y+4*pi*13*0*Dy+4*pi^2*13^2*y=4*pi^2*13^2*[x-sin(2*pi*x)/(2*pi)]','y(0)=0','Dy(0)=0','x')

Answer 1

4*pi*13*0*Dy 乘以0 所以这部分去掉吧 *[x-sin(2*pi*x)/(2*pi)]这个表达不对,matlab表达是不带[] 用()代替 y=dsolve('D2y+4*pi^2*13^2*y=4*pi^2*13^2*(x-sin(2*pi*x)/(2*pi))','y(0)=0,Dy(0)=0','x') y = sin(26*pi*x)/(4368*pi) - cos(26*pi*x)*((sin(26*pi*x)/26 - (13*sin(24*pi*x))/48 + (13*sin(28*pi*x))/56)/pi - x*cos(26*pi*x)) + sin(26*pi*x)*((cos(26*pi*x)/26 - (13*cos(24*pi*x))/48 + (13*cos(28*pi*x))/56)/pi + x*sin(26*pi*x))