surd

TODAY...Definition of a Surd:The nth root of a number a is denoted as n√a (also as a1/n)Let a be a rational number and n a positive integer.Then n√a is called a Surd if it, i.e. n√ais an irrational number.n√ais spoken as “nth root of a”nthroot of a number a is a surd, if it is an irrational number.
Examples of Surds:2√2 or just √2 is a surd.3√9, 3√16, 4√25, 5√100 are all numbers whose given roots are not rational numbers. They are therefore Surds.


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