Control Systems
The characteristic equation of a control system is given by What are the angles of asymptotes of the root loci for k ≥ 0?

 0°, 120°, 240°
 120°, 180°, 240°
 0°, 180°, 300°
 60°, 180°, 300°

ANSWER DOWNLOAD EXAMIANS APP

Control Systems
A cascade of three linear time invariant systems is causal and unstable. From this we conclude that

 each system in the cascade is individually caused and unstable.
 at least one system is causal and all systems are unstable.
 the majority are unstable and the majority are causal.
 at least one system is unstable and at least one system is causal.

ANSWER DOWNLOAD EXAMIANS APP