1. The problem statement, all variables and given/known data I'm trying to write a program to solve a system of 3 non-linear equations using the Newton-Raphson method. I'm stuck on trying to figure out what the formula for a system of 3 unknowns is. I can't remember the derivation at all and after endless hours of googling and looking at pdfs (they all list a two-by-two ARG!) 2. Relevant equations 3. The attempt at a solution Does anyone know what the formula looks like for a 3by3 or an arbitrary system? Thanks!