The given differential equation is a model of an undamped spring/mass system in which the restoring force F(x) in (1) m d2x dt2 + F(x) = 0 (1) is nonlinear. For the equation use a numerical solver to plot the solution curves that satisfy the given initial conditions. d2x dt2 + x3 = 0, x(0) = 1, x'(0) = 1; x(0) = 3 4 , x'(0) = −1

Determine the behavior of the spring/mass system ast-oo