nth root

The four 4th roots of −1, none of which is real

The three 3rd roots of −1, one of which is a negative real

In mathematics, the nth root of a number x, where n is a positive integer, is a number r which, when raised to the power n yields x

where n is the degree of the root. A root of degree 2 is called a square root and a root of degree 3, a cube root. Roots of higher degree are referred by using ordinal numbers, as in fourth root, twentieth root, etc.

单词	Radical root
释义	Radical root 英语百科 nth root In mathematics, the nth root of a number x, where n is a positive integer, is a number r which, when raised to the power n yields x where n is the degree of the root. A root of degree 2 is called a square root and a root of degree 3, a cube root. Roots of higher degree are referred by using ordinal numbers, as in fourth root, twentieth root, etc.
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Radical root

nth root