Show that Eq. (11.34b) follows from inserting Eq. (11.34a) into Eq. (11.31). In addition,...

Show that Eq. (11.34b) follows from inserting Eq. (11.34a) into Eq. (11.31). In addition, show that the stability range given in the text (cf. Eq. (11.35)) also follows. Most of the following exercises are best completed using a personal computer able to run programs such as Maple™, Mathemcitica™, or Maxima™. In these exercises the notation is used.