Numerator Command

Numerator[ <Function> ]

Returns the numerator of the function.

Example:

Numerator[(3x² + 1) / (2x - 1)] yields f(x) = 3x² + 1.

Numerator[ <Number> ]

For a rational number returns its numerator. It uses a numerical method, which limits this command to numbers with small denominator. For irrational input the numerator of its continued fraction is returned.

Note: See also Denominator Command and FractionText Command.

CAS Syntax

Numerator[ <Expression> ]

Returns the numerator of a rational number or expression.

Examples:

• Numerator[2/3 + 1/15] yields 11.
• If variables a, b and c haven't been previously defined in GeoGebra, then Numerator[a/b] yields a and Numerator[Simplify[a + b/c]] yields a c + b