1. linear time-invariant (LTI), linear time-varying (LTV), or nonlinear
2. 1st order, 2nd order, or higher order
3. homogeneous or inhomogeneous
by marking the appropriate column. The unknown function x(t) represents the state of some
mechanical system and t represents time. Hint: An ODE is considered nonlinear only if the
nonlinearity involves the unknown function x(t).
Fig: 1