i have solve this equation using ode45 now i want to know how to solve using ode113 and ode23

d2x/dt2 +4x=12t

[Roger Stafford]

You don’t need to use Matlab to solve this simple differential equation. Its solution is well known to be:

x = a*sin(2*t)+b*cos(2*t)+3*t

where the constants a and b are determined by initial conditions.