using solve function and getting 0-by-1

hello i am having this set of 4 differential first order equations : ode1(t) =

      diff(x(t), t) == (36552913157447*x(t))/17179869184
 diff(x(t), t) == -(3598384661667177*x(t))/2199023255552
                     diff(x(t), t) == 87500*x(t) + 12000
                            diff(x(t), t) == -89000*x(t)

now when I type : solver = solve(ode1,t)

i get :

solver =

Empty sym: 0-by-1

what to do ?

Answer 1

[Torsten]

syms x(t) 
eqn = diff(x, t) == (36552913157447*x)/17179869184 ;
sol = dsolve(eqn)

Same for the other differential equations.

Best wishes

Torsten.

[tomer polsky]

ye it worked but i want to get answer for x as vector (4X1)

[Torsten]

"Solve System of Differential Equations"

under

https://de.mathworks.com/help/symbolic/dsolve.html

should help.

Best wishes

Torsten.

[tomer polsky]

as i said i tried using solve but i get the followin answer : solver =

Empty sym: 0-by-1

[Torsten]

Look at the example in the link and you'll see how to proceed.

Best wishes

Torsten.

[tomer polsky]

the problem in the link that u send me , is that the equations that i need to solve i get in the command window unlike in the link that u sent me i write the equations in the editor