# Going into a test tomorrow about Derivatives of Exp/Log Functions!

• Apr 27th 2008, 08:27 PM
Jeavus
Going into a test tomorrow about Derivatives of Exp/Log Functions!
Anyone have any last minute tips for me? I've done a lot of studying and I'm hoping I know everything...

I do have a question.

It's a very urgent homework help question.

I need to poll the people here for my calculus class. The question?

WHO HERE LOVES CALCULUS?!
• Apr 27th 2008, 08:30 PM
Mathstud28
Quote:

Originally Posted by Jeavus
Anyone have any last minute tips for me? I've done a lot of studying and I'm hoping I know everything...

I do have a question.

It's a very urgent homework help question.

I need to poll the people here for my calculus class. The question?

WHO HERE LOVES CALCULUS?!

$log_a(u(x))=\frac{\ln(u(x))}{\ln(a)}$

Therefore $\frac{D[\log_a(u(x))]}{dx}=\frac{D[\frac{\ln(u(x))}{\ln(a)}]}{dx}=\frac{1}{\ln(a)}\frac{D[\ln(u(x))]}{dx}$ $=\frac{u'(x)}{\ln(a)u(x)}$