Results 1 to 2 of 2

Thread: Rationalizing teh demonitator

  1. November 10th 2008, 05:34 PM #1
    Jezus53
    Jezus53 is offline
    Newbie
    Joined
    Nov 2008
    Posts
    1

    Rationalizing teh demonitator

    I need help rationalizing the denominator for:

    1/(x^(1/3) + 1)

    I have no idea where to start and It's really bugging me.
    Follow Math Help Forum on Facebook and Google+
  2. November 10th 2008, 06:13 PM #2
    mmm4444bot
    mmm4444bot is offline
    Junior Member
    Joined
    Oct 2008
    From
    Seattle, Washington
    Posts
    63
    Think of the expression in the denominator as one of the two factors in a sum of cubes. If we multiply top and bottom by the other factor, then we will get x+1 in the denominator of the product.

    \frac{1}{\sqrt[3]{x} + 1} \cdot \frac{\sqrt[3]{x^2} - \sqrt[3]{x} + 1}{\sqrt[3]{x^2} - \sqrt[3]{x} + 1} = ?

    Cheers,

    ~ Mark
    Follow Math Help Forum on Facebook and Google+
« Solving for unknown - natural log involved | quadratic functions stops my function »

Similar Math Help Forum Discussions

  1. Rationalizing
    Posted in the Algebra Forum
    Replies: 1
    Last Post: September 14th 2011, 07:01 AM
  2. Rationalizing the Denominator
    Posted in the Algebra Forum
    Replies: 1
    Last Post: February 2nd 2009, 08:13 AM
  3. Rationalizing the Numerator
    Posted in the Algebra Forum
    Replies: 3
    Last Post: February 1st 2009, 05:30 PM
  4. Rationalizing denominators
    Posted in the Algebra Forum
    Replies: 2
    Last Post: January 24th 2009, 05:04 PM
  5. Rationalizing
    Posted in the Algebra Forum
    Replies: 4
    Last Post: December 16th 2007, 09:17 PM

Search Tags


/mathhelpforum @mathhelpforum