Details and Options
- Numerator picks out terms that do not have superficially negative exponents. Denominator picks out the remaining terms.
- An exponent is "superficially negative" if it has a negative number as a factor.
- The standard representation of rational expressions as products of powers means that you cannot simply use Part to extract numerators.
- NumeratorDenominator can be used on rational numbers.
- NumeratorDenominator automatically threads over lists.
Examplesopen allclose all
Basic Examples (3)
NumeratorDenominator automatically threads over lists:
Apply Exponent to find the degree of the numerator and denominator:
This can be confirmed using Limit:
Wolfram Research (2019), NumeratorDenominator, Wolfram Language function, https://reference.wolfram.com/language/ref/NumeratorDenominator.html.
Wolfram Language. 2019. "NumeratorDenominator." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/NumeratorDenominator.html.
Wolfram Language. (2019). NumeratorDenominator. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/NumeratorDenominator.html