# Math Help - Complex fractions

1. ## Complex fractions

Thanks
Chester

2. Your method is correct, but your denominator is slightly incorrect.

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

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

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

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

-Dan

3. ## 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?

4. 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

5. ## How you post your response

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?

Thanks again for your time

Chester

6. 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?

Thanks again for your time

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

7. 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.

8. Originally Posted by Quick
They really should post the LaTex Tutorial as a sticky in one of the forums.
Not a bad idea.