The information about the quantity under measurement has to be conveyed to thepersonnel handling the instrument or the system for monitoring, control, or analysispurposes
Choose the test point between s=0 and s=-2, the number of real poles and zeros in the right side is odd number. So the root locus is existing between these two points
A system is said to be completely state controllable if it is possible to transfer the system state from any one initial state X(t0) at any other desired state X(t),in specified finite time by a control vector U(t).