(a) Express an and b n in terms of the G n defined in Equation (48c). (b) Assume now that the an and b n in are real-valued. Show that this equation can be written in the following form:   Where  are...

(a) Express an and b_n
in terms of the G_n
defined in Equation (48c).

(b) Assume now that the an and b_n
in are real-valued. Show that this equation can be written in the following form:

Where
 are sequences of real-valued constants. Express cn and φn in terms of the Gn of Equation (48c) and vice versa.