1. ## Simplifying/Reducing

Could somebody please show me how to simplify this?

((1/4)x^(-3/4)*y^(3/4)/(3/4)x^(1/4)*y^(-1/4))

That is, in words, one-fourth "x" raised to the negative three-fourths, "y" raised to the three-fourths, over/divided by three-fourths "x" raised to the one-fourth, "y" raised to the negative one-fourth.

The answer is (y/3x), or in words, "y" over/divided by 3"x".

I just need to see how to get to that and preferably the quickest way.

Thank you so much for the help!

2. ## re: Simplifying/Reducing

I've converted to Latex for now so that it's easier to read:

$\displaystyle \frac{\bigg(\frac{1}{4}x^{-\frac{3}{4}}y^{\frac{3}{4}}\bigg)}{\bigg(\frac{3}{ 4}x^{\frac{1}{4}}y^{-\frac{1}{4}}\bigg)}$

Thanks!

4. ## re: Simplifying/Reducing

Originally Posted by mabentley
I've converted to Latex for now so that it's easier to read:

$\displaystyle \frac{\bigg(\frac{1}{4}x^{-\frac{3}{4}}y^{\frac{3}{4}}\bigg)}{\bigg(\frac{3}{ 4}x^{\frac{1}{4}}y^{-\frac{1}{4}}\bigg)}$
When you divide with powers you subtract:

$\displaystyle \frac{1/4}{3/4}=\frac{4}{12}=\frac{1}{3}$

$\displaystyle x^{-\frac{3}{4}}-x^\frac{1}{4}=x^\frac{4}{4}=x^{-1}=\frac{1}{x}$

$\displaystyle y^\frac{3}{4}-y^{-\frac{1}{4}}=y^\frac{4}{4}=y^{1}=y$

Multiplying through:

$\displaystyle =\frac{y}{3x}$

5. ## re: Simplifying/Reducing

Thank you very much!

6. ## re: Simplifying/Reducing

You are welcome, feel free to hit the thanks button on the bottom left of your reply

7. ## Re: Simplifying/Reducing

Originally Posted by mabentley
When you divide with powers you subtract:
$\displaystyle x^{-\frac{3}{4}}-x^\frac{1}{4}=x^\frac{4}{4}=x^{-1}=\frac{1}{x}$

$\displaystyle y^\frac{3}{4}-y^{-\frac{1}{4}}=y^\frac{4}{4}=y^{1}=y$
That's not true. It's only the powers that are subtracted.

. $\displaystyle \dfrac{x^{-3/4}}{x^{1/4}} = x^{-3/4 - 1/4} = x^{-1}$

8. ## Re: Simplifying/Reducing

Originally Posted by e^(i*pi)
That's not true. It's only the powers that are subtracted.

. $\displaystyle \dfrac{x^{-3/4}}{x^{1/4}} = x^{-3/4 - 1/4} = x^{-1}$
Sorry the $\displaystyle x^{\frac{4}{4}}$ should have read $\displaystyle x^{-\frac{4}{4}}$. I can see that my wording could also have been clearer. Thanks.