A signal x (t) = 100 cos (2 103) t is ideally sample with sampling period of 50 sec and then passed through an ideal low-pass filter with cut-off frequency of 15 kHz. Which of the following frequencies is/are present at the filter output?

A signal x (t) = 100 cos (2 103) t is ideally sample with sampling

1.	A signal x (t) = 100 cos (2 103) t is ideally sample with sampling period of 50 sec and then passed through an ideal low-pass filter with cut-off frequency of 15 kHz. Which of the following frequencies is/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.