Homework-1: Why is the product term (R+joL)(G+joC) not set to zero? Please explain this.
The solution for V(z) can be derived from equation (4) as:
V(2) = V*e^(-7z) + Ve + r^2 (5)
Homework-2: Derive the expression of I(z) = Ie^(-r+z) + ITe^+rz (6)
where I = VZo, I = -VZo, and Zo = √(R+joL)/(G+joC). Here, Zo is the characteristic impedance of the line.
Homework-3: A lossless transmission line is a line with R=0=G. Then, for this line, specialize the voltage and current waves in equations (5) and (6).