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/in /by

BC:3.1 For the discrete time function f[n] cos (0.4?? + 25°) (-0.9)”u[n] a.) Sketch the waveform for fIn] vs n. Label the value of the signal for the first 5 nonzero sam- ples. b.) Sketch the waveform, x[n] = 25-f[n] (tIn 2]-11[72-5] ) vs n. Label the values of r[n] for samples where -2n

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