# Natural Logs help

• July 4th 2010, 02:08 PM
orkdork
Natural Logs help
$ln (e^{x^2-y^2})$

Anyone able to help me?
• July 4th 2010, 02:11 PM
pickslides

$\log_ab^c = c\log_ab$
• July 4th 2010, 02:11 PM
Also sprach Zarathustra
Use this formula:

$ln (a)^b=b \cdot ln(a)$
• July 6th 2010, 01:09 AM
HallsofIvy
Another way to do basically what pickslides and Also sprach Zarathustra suggest is to use the fact that ln(x) and $e^x$ are inverse functions: $ln(e^x)= x$.
• July 6th 2010, 07:12 AM
mr fantastic
Quote:

Originally Posted by orkdork
$ln (e^{x^2-y^2})$

Anyone able to help me?

If you say what you're meant to be doing with this expression, then the answer to "anyone able to help me?" might be yes.