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When is a complex exponential signal pure DC?

Posted: Thu Jul 14, 2022 11:05 am
by answerhappygod
a) σ = 0 and Ω < 0
b) σ < 0 and Ω = 0
c) σ = 0 and Ω = 0
d) σ < 0 and Ω < 0