# Griffiths page 146

1. Feb 24, 2008

### ehrenfest

[SOLVED] Griffiths page 146

1. The problem statement, all variables and given/known data
EDIT: sorry I realized I posted this in the wrong forum; someone can move it to the advanced physics forum if you want

On that page, Griffiths says "and then the binomial expansion yields" and I am not sure what binomial expansion he is talking about. On the next line how did he get the second approximate equality? How in the world did he get rid of the ( )^(-1/2) operation ?

2. Relevant equations

3. The attempt at a solution

Last edited: Feb 24, 2008
2. Feb 24, 2008

### ehrenfest

Never mind. See equation 3.93.