Difference between revisions of "Denominator Command"

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:Returns the denominator of a function.
 
:Returns the denominator of a function.
 
:{{example|1=<div><code><nowiki>Denominator[5 / (x^2 + 2)]</nowiki></code> yields ''f(x)=(x<sup>2</sup> + 2)''.</div>}}
 
:{{example|1=<div><code><nowiki>Denominator[5 / (x^2 + 2)]</nowiki></code> yields ''f(x)=(x<sup>2</sup> + 2)''.</div>}}
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;Denominator[ <Number> ]
 +
:For a rational number returns its denominator. It uses a numerical method, which limits this command to numbers with small denominator. For irrational input the denominator of a its [[ContinuedFraction Command|continued fraction]] is returned.
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{{note|1=See also [[Numerator Command]] and [[FractionText Command]].}}
  
{{notes|1=
 
:*For a fast numerical method (so long as the numbers aren't too big) you can use these in the ''Input Bar'': <code>CommonDenominator[a,a]</code> for denominator and <code>round(a*CommonDenominator[a,a])</code> for Numerator
 
:*See also [[Numerator Command]].}}
 
  
 
==CAS Syntax==
 
==CAS Syntax==

Revision as of 22:49, 27 December 2015


Denominator[ <Function> ]
Returns the denominator of a function.
Example:
Denominator[5 / (x^2 + 2)] yields f(x)=(x2 + 2).
Denominator[ <Number> ]
For a rational number returns its denominator. It uses a numerical method, which limits this command to numbers with small denominator. For irrational input the denominator of a its continued fraction is returned.


CAS Syntax

Denominator[ <Expression> ]
Returns the denominator of a rational number or expression.
Example:
Denominator[2 / 3 + 1 / 15] yields 15.
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