# Math Help - Two functions converging

1. ## Two functions converging

Hello!

Suppose i have two functions f(x) > g(x). I need that f(x) - g(x) = 0 (well, as close as possible to zero) from some point x* on. Does anyone know a condition to guarantee that?

A.

2. The solution to your problem is the value x that minimizes the quantity...

$e(x) = f(x) - g(x)$ (1)

... which is one of the numbers $x$ that satisfies the equation...

$e^{'} (x)=0$ (2)

... with the further condition...

$e^{''} (x) > 0$ (3)

Kind regards

$\chi$ $\sigma$

3. ## Two Functions converging (Solved)

SURE!

Thank you very much for your help!

Best Regards,

A.