Consider three discrete-time systems S1, S2, and S3 whose respective responses to a
Chapter 3, Problem 3.18(choose chapter or problem)
Consider three discrete-time systems S1, S2, and S3 whose respective responses to a complex exponential input ei""12 are specified as sl : ej7rnl2 ----7 ejmz/2u[n], s2 : ej7rn/2 ----7 ej37rnl2, s3 : ej7rn/2 --7 2ej57rn/2. For each system, determine whether the given information is sufficient to conclude that the system is definitely not LTI.
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