# root

**root** In mathematics, fractional power of a number. The square root of a number, *x*, is written as either √*x* or *x*½. The fourth root of *x* may be written in radical form as ^{4}√*x* or in power form as *x*√. The fourth root of 16, for example, is 2 since 2 × 2 × 2 × 2 = 16.

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# root (mathematics)

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