**nth Root**

The number that must be multiplied times itself *n* times to equal a given value. The *n*th root of *x* is written or . For example, since 2^{5} = 32.

Notes: When *n* = 2 an nth root is called a square root. Also, if *n* is even and *x* is negative, then is nonreal.

**See also**

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