# Complex fractions

• Jul 31st 2006, 04:20 PM
Chester
Complex fractions

Thanks
Chester
• Jul 31st 2006, 04:28 PM
topsquark

$\frac{ \frac{1}{3} + \frac{1}{y} }{ \frac{y}{3} - \frac{3}{y} }$ $\times \frac{3y}{3y}$

$= \frac{ \frac{1}{3}(3y)+ \frac{1}{y}(3y) }{ \frac{y}{3}(3y) - \frac{3}{y}(3y) }$

$= \frac{ y+ 3 }{ y^2 - 9 }$

$= \frac{y+3}{(y+3)(y-3)} = \frac{1}{y-3}$, $y \neq 3, \, -3, \, 0$

-Dan
• Jul 31st 2006, 04:39 PM
Chester
Thanks
I just need to simplify and reduce to lowest term.

would this be correct?

y+3
----------
(y+3)(y-3)

Chester. How to you post your response?
• Jul 31st 2006, 04:52 PM
topsquark
Quote:

Originally Posted by Chester
I just need to simplify and reduce to lowest term.

would this be correct?

y+3
----------
(y+3)(y-3)

Chester. How to you post your response?

Once you cancel the common y+3, yes.

I'm not sure what you mean by "post your response?"

-Dan
• Jul 31st 2006, 05:31 PM
Chester
Thanks. I would like to find out how you make your posts look like they are done in equation editor. Are there any instructions on the site for doing this?

Chester
• Jul 31st 2006, 05:40 PM
topsquark
Quote:

Originally Posted by Chester
Thanks. I would like to find out how you make your posts look like they are done in equation editor. Are there any instructions on the site for doing this?

Chester

(Sigh) I can't find the link. Somewhere in here is a quick set of instructions. Briefly, if you want to see how the text is coded, left-click on the expression and a box will come up.

The basics are that all code for LaTeX on this forum is in between the two sets of boxes " [ math ] " and " [ /math ] ." (Without the spaces and quotes!) A decent reference for basic forms can be found here: http://meta.wikimedia.org/wiki/Help:Formula

So far, everything I've found on this page works in this forum.

Common examples:
$x^2$

$x_1$

$x_1^3$

$\sqrt{ x^{3/2} }$

$\frac{x-1}{x^2+2x}$

You get used to it after a while. :)

-Dan
• Jul 31st 2006, 06:54 PM
Quick
Quote:

Originally Posted by topsquark
(Sigh) I can't find the link.

-Dan

They really should post the LaTex Tutorial as a sticky in one of the forums.
• Jul 31st 2006, 07:03 PM
ThePerfectHacker
Quote:

Originally Posted by Quick
They really should post the LaTex Tutorial as a sticky in one of the forums.