Denominator Command

Denominator( <Function> )

Returns the denominator of a function.

Denominator(5 / (x^2 + 2)) yields f(x)=(x2 + 2).

Denominator( <Number> )

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

  • Denominator(5 / 3) yields 3.

  • Denominator(10 / 6) yields 3.

  • Denominator(15 / 3) yields 1.

See also Numerator Command and FractionText Command.

CAS Syntax

Denominator( <Expression> )

Returns the denominator of a rational number or expression.

Denominator(2 / 3 + 1 / 15) yields 15.