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1. |
A discrete time signal, which is both linear and time invariant has an impulse response is u[n]. What is the response of the system for an input δ[n - 4]? |
A. | u[n - 2] |
B. | u[n - 4] |
C. | u[n + 2] |
D. | u[n + 4] |
Answer» C. u[n + 2] | |