Numerator
The number above a fraction bar in a fraction.
nth root of a number
Let $a$ and $b$ be real numbers and let $n$ be an integer such that \(n \ge 2\). If \(a = {b^n}\) then $b$ is the $n$th root of $a$.
Negative exponents
Let $n$ be an integer and let $a$ be a real number, variable, or algebraic expression such that \(a \ne 0\). \({a^{ – n}} = \frac{1}{{{a^n}}}\) and \(\frac{1}{{{a^{ – n}}}} = {a^n}\).
Natural numbers
The counting numbers: 1, 2, 3, 4, 5, ….
Name
In function notation, $f$ in $f(x)$.
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