... 11 SIGNALS AND SYSTEMS (4 Fig. 1-25 SIGNALS AND SYSTEMS 1.8. Show that [CHAP. 1 (a) If x(t) and x[n] are even, then (b) If x(t) and x[n] are odd, then x(0) = 0 and ... SIGNALS AND SYSTEMS [CHAP. 1 common multiple of T, and T2, and it is given by Eq. (1.84) if the integers m and k are relative prime. If the ratio T,/T, is an irrational number, then the signals ... BASIC SIGNALS 1.21. Show that CHAP. 11 SIGNALS AND SYSTEMS Let T = - t. Then by definition (1.18) Since T > 0 and 7 < 0 imply, respectively, that t < 0 and r...