(adsbygoogle = window.adsbygoogle || []).push({}); [SOLVED] Logs and rearranging

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

I want to show that NlnN - n1ln(n1) - n2ln(n2) is equal to:

-N{(n1/N)ln(n1/N) + (n2/N)ln(n2/N)}

apparently i can do this by the artifice of adding and subtracting the term n1lnN and then regrouping.

2. Relevant equations

3. The attempt at a solution

I can get the form required but i still have leftover N's and n1s and n2s, anyone know how to do this? thanks

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Logs and rearranging

Can you offer guidance or do you also need help?

**Physics Forums | Science Articles, Homework Help, Discussion**