1.

A signal x(t) = 100 cos (24p x 103t) is ideally sampled with a sampling period of 50 μ sec and then passed through an ideal low pass filter with cut off frequency of 15 kHz Which of the following frequencies are present at the filter output?

A. 12 kHz only
B. 8 kHz only
C. 12 kHz and 9 kHz
D. 12 kHz and 8 kHz
Answer» E.


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