Power loss in a transmission line

[Cocoleia]

Homework Statement

Homework Equations

The Attempt at a Solution

I have posted the whole solution so it is more complete, but I really only need help with part c (I think)

My output power is higher than my input power, I'm not sure where I'm going wrong

 

[haruspex]

I have no idea what the information regarding A, B, C and D means. Do they refer to a diagram or is this some standard notation for such problems?

 

[gneill]

I have no idea what the information regarding A, B, C and D means. Do they refer to a diagram or is this some standard notation for such problems?

I believe they refer to the ABCD-Parameters for a two port network:

 

[rude man]

I'm sorry but I can't make out your writing. You should type everything in unless you have particularly large and clear writing. You don't have to learn latex necessarily; click on the summation sign (upper case sigma) for lots of symbols.

You can solve for V₁/I₁ and V₂/V₁ with I₂ = 0 in the post 3 equations to get all the answers.
.

 

[haruspex]

unless you have particularly large and clear writing.

Even then, it is hard making comments on lines of algebra in the middle of images (unless the equations are numbered in the image).