Nth root

Arithmetic operation, inverse of nth power

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.

From Wikipedia, under CC BY-SA. More on occurri.