Numerator Command

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Numerator[ <Function> ]
Returns the numerator of the function.
Example:
Numerator[(3x² + 1) / (2x - 1)] yields f(x) = 3x² + 1.

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[a + b/c] yields a c + b


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.
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