Numerator Command

Numerator[ <Function> ]

Returns the numerator of the function.

Example:

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

Note:

• For a fast numerical method (so long as the numbers aren't too big) you can use these in the Input Bar: CommonDenominator[a, a] for denominator and round(a*CommonDenominator[a, a]) for Numerator.
• See also Denominator 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