7.2. A continuous-time signal x(t) is obtained at the output of an ideal lowpass filter with cutoff frequency w 1,000. If impulse-train sampling is performed on x(1), which of the following

sampling periods would guarantee that x(1) can be recovered from its sampled version using an appropriate lowpass filter? (a) 7 0.5 x 10-3 (b) T = 2x 10-3 (c) T = 10-4