# Nth root

${\displaystyle k^{n}=r}$
(for meaning of ${\displaystyle k^{n}}$, read exponentiation.)
We write it like this: ${\displaystyle {\sqrt[{n}]{r}}}$.
For example, ${\displaystyle {\sqrt[{3}]{8}}=2}$ because ${\displaystyle 2^{3}=8}$.