1. What is the difference between a continuous-time signal and a discretetime signal? 2. What is the difference between an analog signal and a digital signal? 3. Using signal x(t) shown in Fig....

1. What is the difference between a continuous-time signal and a discretetime signal?

2. What is the difference between an analog signal and a digital signal?

3. Using signal x(t) shown in Fig. P1.2-1, sketch

(a) x(−t)

(b) x(t + 5)

(c) x(2t/3)

(d) x(2 − t/2)