# surd

In mathematics, numbers often have to be written using roots or fractional exponents. For example, the number $\sqrt{2}$ cannot be written without using a root or writing ${2}^{1/2}$. A *surd* is an irrational number which can be written as the sum of rational powers of rational numbers.
Another example would be $3\sqrt{2}-\sqrt[3]{5}$.

## References

http://www.mathcentre.ac.uk/students.php/all_subjects/arithmetic^{}/surds/resources/34What is a surd?

Title | surd |
---|---|

Canonical name | Surd |

Date of creation | 2013-03-22 14:17:44 |

Last modified on | 2013-03-22 14:17:44 |

Owner | mathwizard (128) |

Last modified by | mathwizard (128) |

Numerical id | 10 |

Author | mathwizard (128) |

Entry type | Definition |

Classification | msc 11A63 |