Q. 19 The impulse response h[n] of a linear time-invariant system is given by h[n] = u[n + 3] + u[n – 2) – 2n[n – 7] where u[n] is the unit step sequence. The above system is
(A) stable but not causal
(B) stable and causal
(C) causal but unstable
(D) unstable and not causal
Answer: (A).
Explanation:
