Numerator Command

Numerator( <Function> )

Returns the numerator of the function.

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

Numerator( <Number> )

For a rational number returns its (simplified) 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.

  • Numerator(5 / 3) yields 5.

  • Numerator(10 / 6) yields 5.

  • Numerator(15 / 3) yields 5.

See also Denominator Command and FractionText Command.

CAS Syntax

Numerator( <Expression> )

Returns the numerator of a rational number or expression.

  • 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