Nth root

Uncommon card · No. 185023

In mathematics, an nth root of a number x is the number r which, when n copies are multiplied together, yields x: r n = r × r × ⋯ × r ⏟ n factors = x . {\displaystyle r^{n}=\underbrace {r\times r\times \dotsb \times r} _{n{\text{ factors}}}=x.} The positive integer n is called the index or degree, and the number x of which the root is taken is the radicand. 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. The computation of an nth root...

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