Q72
Let x(t) = cos(10πt) + cos(30πt) be sampled at 20 Hz and reconstructed using an ideal low-pass filter with cut-off frequency of 20 Hz. The frequency/frequencies present in the reconstructed signal is/are
A.
5 Hz and 15 Hz only
AnswerB.
10 Hz and 15 Hz only
C.
5 Hz, 10 Hz and 15 Hz only
D.
5 Hz only
Answer: Option A
Solution
Answer: Option A
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