Question: The sequence x[n] = cos (/4 n). < n < was obtained by sampling a continuous-time signal x c (t) = cos (

The sequence 

x[n] = cos (π/4 n).        −∞ < n < ∞

was obtained by sampling a continuous-time signal 

xc(t) = cos (Ω0t).           −∞ < t < ∞,

at a sampling rate of 1000 samples/s, what are two possible positive values of Ω0 that could have resulted in the sequence x[n]?

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