Pronunciation: /ˈræʃ nl/ ?

A mathematical object is rational if it can be expressed as a ratio.

  1. A rational number is a number that can be expressed as the ratio of two integers.
  2. A rational equation is an equation that has a fraction on one or both sides of the equation. A rational equation is also called a fractional equation.
  3. A rational expression is an expression that contains a ratio of two polynomials.
  4. A rational function is a function that contains a rational expression.
  5. A rational root is a root of a polynomial that is a rational number.


    1. rational. http://wordnet.princeton.edu/. WordNet. Princeton University. (Accessed: 2011-01-08). http://wordnetweb.princeton.edu/perl/webwn?s=rational&sub=Search+WordNet&o2=&o0=1&o7=&o5=&o1=1&o6=&o4=&o3=&h=.

    Cite this article as:

    Rational. 2009-02-10. All Math Words Encyclopedia. Life is a Story Problem LLC. http://www.allmathwords.org/en/r/rational.html.


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    Revision History

    2009-02-10: Added definition of rational equation (McAdams, David.)
    2009-02-06: Added rational root to list (McAdams, David.)
    2009-01-19: Initial version (McAdams, David.)

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