Anuendix A Solutioiis t,o t,he Exercises If XI 49 1x1 = 0,no phase has been defined; write riidl 5s (s) = - +5 s2+2si17 5(s i 1) ) Z { 42 -~ (Sf with Re{s} > -1 4tt for - < t < - t for (1 < t < otherwise olulion 9.8 a) Conjugate symmetry, i.e real part evel1, irr~agirrarvpart odd: X( JW) = X"(gc*?) b) Real part odd, iniaginary part even: X( - ,?U) = - X ' ( J U )