Nth root

Nth root of a number r is a number which, if multiplied by itself n times, makes r. You could also say that it is a number k for which the following equation is true:

[math]\displaystyle{ k^n=r }[/math]

(for meaning of [math]\displaystyle{ k^n }[/math], read exponentiation.)

We write it like this: [math]\displaystyle{ \sqrt[n]{r} }[/math]. Template:Math-stub