Chapter 8, Problem 8.20P

To determine

(a)

The response $x\left(t\right)$ for the model equation $3\ddot{x}+21\dot{x}+30x=0$.

To determine

(b)

The response $x\left(t\right)$ for the model equation $5\ddot{x}+20\dot{x}+20x=0$.

To determine

(c)

The response $x\left(t\right)$ for the model equation $2\ddot{x}+8\dot{x}+58x=0$.