ok this prob is a little trickier (x double dot) is given. in gen as a func of x, x dot and t, and here by expression -dot of x + 2e^(-t)+1
Find solution for x(t)
which satisfies x(0)= dot of x(0)=0
I can do init conditions ok on this I think, I'd just like to see how the process of the equation works on this, its probz done in a similar way to the previous one...