1. The problem statement, all variables and given/known data Hey, I am trying to approximate the solution to a second order ODE using the 4th order Runge-Kutta. I was told that in order to do this, I have to write the second order ODE and a pair of 1st order ODEs. Given that my differential equation is d^2v/dt^2 + adv/dt + bv = 0, where a and b are constant coefficients, I am a little lost on how to do this. Any advice on how to approach this? Thanks 3. The attempt at a solution The ODE I am trying to approximate involves voltage as a function of time. The examples that I have seen involve position, velocity and acceleration - so there is a relationship (x' = v) I am unsure as how to do this in my case.