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Root (Radical)

The $n$th root (or ``Radical'') of a quantity $z$ is a value $r$ such that $z=r^n$, and therefore is the Inverse Function to the taking of a Power. The $n$th root is denoted $r=\root n\of z$ or, using Power notation, $r=z^{1/n}$. The special case of the Square Root is denoted $\sqrt{z}$. The quantities for which a general Function equals 0 are also called Roots, or sometimes Zeros.

See also Cube Root, Root, Square Root, Vinculum

© 1996-9 Eric W. Weisstein