# Intro to real analysis

1. Apr 17, 2014

### ares25

ignore

Sorry for the post. I'll take it down soon.
Thanks for the help

Last edited: Apr 17, 2014
2. Apr 17, 2014

### jbunniii

Use the triangle inequality in this form:
$$||u|-|v|| \leq |u-v|$$
with $u = f(x) - x$ and $v = f(y) - y$.