What is the characteristic equation of a sampled system?
A) Stable for all values of fioike
B) Stable for Kq(z)=z^(2)+(2k-1.75)z+25=0 where K>0 and K-0.5
C) Stable for Kq(z)=z^(2)+(2k-1.75)z+25=0 where K>0
D) Stable for all values of K>0