Runge-Kutta-Felherg Method to Solve 3rd Order ODE in Fortran 95
I need help to build Fortran 95 code that solves 3rd order ODE using Runge-Kutta-Felherg method. I am trying to solve y”’ = -2y”+y’+2y with y(0)=3, y'(0)=-2, and y”(0)=6. The exact solution should be