If x(n) is causal, then lim┬(z→∞)X(z)=?
A. x(-1)
B. x(1)
C. x(0)
D. Cannot be determined
Answer:A
If x(n) is causal, then lim┬(z→∞)X(z)=?
A. x(-1) B. x(1) C. x(0) D. Cannot be determined
Explanation: According to the initial value theorem, X(z)=x(0)+x(1)z -1+x(2)z-2+….