~r -1,xs Appendix A Solutioris to the Exercises Solution Y ( S ) = H(s) X ( s ) - (1 - @) S b) + ( s ~+( lG) (-t s+ ) 2(us + h) - (s + l)(s + ) - + (s + l)(s + 3) - b) No, because the stczies a w iiot the saIric: (7.58) oizly liolds for direct form IIT The relatitions (7.56) mtl (7.57) are dilh-rnt for ( ~ ~ choice o f s t R t C arid niust ?xdctcririined beforfkmd Solution 8.1 Tlic response of and RC lowpass filter to a square pulsc (8.7) For TOi according to 1,'Hospital: The impulse wspoiise (8.4) with ' h ( / )= -e-+ r E(t) S ~ l ~ 8.2 ~ t ~ O ~ U T - is: