# Homework Help: Derivation of the energy of an alloy

1. Nov 9, 2017

### MathematicalPhysicist

1. The problem statement, all variables and given/known data
2. Relevant equations

3. The attempt at a solution
My question is how to derive $(4.13)$ from the above preceding paragraphs?, I am not sure how achieve these terms.

2. Nov 14, 2017

### PF_Help_Bot

Thanks for the thread! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post? The more details the better.

3. Dec 8, 2017

### MathematicalPhysicist

No one knows?