# How to get the derivative of this ln function?

• Mar 8th 2011, 10:15 PM
Huberthink
How to get the derivative of this ln function?
http://img181.imageshack.us/img181/5529/88998479ei5.gifThe function is in the image up there. I'm pretty sure you use quotient rule, take the derivatives, etc.
But the part I have trouble with is the simplification process.
I'd really appreciate it if someone could help walk me through how to solve this.

Note to poster: Use a thread title indicative of the nature of the question, also post in the most appropriate forum, this is calculus so it goes in the calculus forum.
• Mar 8th 2011, 11:32 PM
earboth
Quote:

Originally Posted by Huberthink
http://img181.imageshack.us/img181/5529/88998479ei5.gifThe function is in the image up there. I'm pretty sure you use quotient rule, take the derivatives, etc.
But the part I have trouble with is the simplification process.
I'd really appreciate it if someone could help walk me through how to solve this.

1. Welcome!

2. You wrote that you've had troubles simplifying this equation. We would like to know your troubles so we can help you much better. So show what you've done so far.

3. You have read certainely the forum rules carefully, right? So I assume that you posted your question by accident in the wrong forum.
• Mar 8th 2011, 11:34 PM
pickslides
Use the chain rule here. make $\displaystyle u=(x^4+5x^2)^{\frac{3}{2}}$