The SQRT() function can be used to return the square root of a number. To find a different root, use the exponentiation operator (^ – the caret above the 6) and the inverse of the root. For instance:
=27^(1/3) returns the cube root of 27, or 3.
=16^(1/4) returns the 4th root of 16, or 2.
Put the “inverse” calculation in parentheses because exponentiation takes precedent over division, and you want the division to happen first.