Reason (R): A system is unstable if the roots of the characteristic equation lie outside the unit circle.
A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true but R is NOT the correct explanation of A
C. A is true but R is false
D. A is false but R is false
Answer:A
Reason (R): A system is unstable if the roots of the characteristic equation lie outside the unit circle.
A. Both A and R are true and R is the correct explanation of A B. Both A and R are true but R is NOT the correct explanation of A C. A is true but R is false D. A is false but R is false
Explanation: Difference equation is y (n+2)-5 y (n+1) + 6 y (n) =x (n).