Solution 3.8.2.2 Let Z 1 = 1 C 1 s and Z 2 = R 2 + 1 C 2 s = R 2 C 2 s +1 C 2 s : Then V o (s)=  Z 2 Z 1 + Z 2  V i ;; Thus V o (s) V i (s) = R 2 C 2 s +1 C 2 s R 2 C 2 s +1 C 2 s + 1 C 1 s (C 1 s)(C 2 s) (C 1 s)(C 2 s) = (C 1 s)(R 2 C 2 s +1) ((C 1 s))(R 2 C 2 s +1)+C 2 s = (R 2 C 1 C 2 )s(s + 1 R 2 C 2 ) R 2 C 1 C 2 s 2 +(C 1 + C 2 )s = s + 1 R 2 C 2 s + C 1 + C 2 R 2 C 1 C 2 : 1