What does  irrational mean?

Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter11: Rational And Irrational Numbers
Section11.1: Properties Of Rational Numbers
Problem 15OE
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What does  irrational mean?

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A number which is not rational is irrational number.

A rational number is number which can be expressed in the form of pq, where q0.

So, we can say that an irrational number a number which can't be expressed in the form of pq.

Example: 2,5 etc are irrational number.

Decimal expansion of irrational number neither terminate nor repeat.

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