Question

求大神解答啊关于MATLAB的问题

Error in dsolve (line 2)
[x,y]=dsolve('Dx=2*y-5*x+exp(t)','Dy=x-6*y+exp(-2*t)','x(0)=0','y(0)=0','t')
我输入我run后总是显示这个问题！！在线等啊！！急！！

Answer 1

[x,y]=dsolve('Dx=2*y-5*x+exp(t)','Dy=x-6*y+exp(-2*t)','x(0)=0','y(0)=0','t')

x =

exp(-7*t)*(2*exp(3*t)*((exp(2*t)*(2*exp(3*t) + 5))/30 - 7/30) + (exp(5*t)*(5*exp(3*t) - 16))/120 + 11/120)

y =

-exp(-7*t)*((exp(5*t)*(5*exp(3*t) - 16))/120 - exp(3*t)*((exp(2*t)*(2*exp(3*t) + 5))/30 - 7/30) + 11/120)
没错。

追问

syms x y t
[x,y]=dsolve('Dx=2*y-5*x+exp(t)','Dy=x-6*y+exp(-2*t)','x(0)=0','y(0)=0','t')
simple(x);
simple(y);
ezplot(x,y,[0,1.3]);axis auto
这是我的整个程序！！但是就是run后显示
Error in dsolve (line 2)
[x,y]=dsolve('Dx=2*y-5*x+exp(t)','Dy=x-6*y+exp(-2*t)','x(0)=0','y(0)=0','t')
请问这是为什么！！谢谢！！！

追答

syms x y t
 [x,y]=dsolve('Dx=2*y-5*x+exp(t)','Dy=x-6*y+exp(-2*t)','x(0)=0','y(0)=0','t')
 simple(x);
 simple(y);
 ezplot(x,y,[0,1.3]);

axis auto

没错呀 

图：