# Function question need help

• March 2nd 2012, 03:07 PM
mathkid12
Function question need help
Find f ' (x) for the function

f(x) = x^2 / x^3 + 4

how to start this and what do f ' mean...
please if you cant help with question tell me what f ' means
• March 2nd 2012, 03:26 PM
Plato
Re: Function question need help
Quote:

Originally Posted by mathkid12
Find f ' (x) for the function
f(x) = x^2 / x^3 + 4
how to start this and what do f ' mean...
please if you cant help with question tell me what f ' means

Surely you mean $\dfrac{x^2}{x^3+4}$.
That is not what you posted.
Now you learn to post correctly if you want proper help.

If $f(x)=\dfrac{g(x)}{h(x)}$ then $f'(x)=\dfrac{g'(x)h(x)-g(x)h'(x)}{[h(x)]^2}$
• March 2nd 2012, 03:37 PM
mathkid12
Re: Function question need help
Sorry for asking how to post that properly LOL