rational function
nounUK /ˈræʃənəl ˈfʌŋkʃən/
US /ˈræʃənəl ˈfʌŋkʃən/
A rational function is a math rule that divides one polynomial by another polynomial.
The teacher explained that f(x) = (x + 1)/(x - 2) is a rational function.
RELATED WORDS
OTHER MEANINGS
2. A function that can be written as the ratio of two polynomials.
Every rational function is defined wherever its denominator is not zero.
3. A mathematical expression formed by dividing one polynomial expression by another.
Simplifying the rational function required factoring both the top and bottom.
4. A function whose output is obtained by dividing two polynomial expressions.
Graphing the rational function revealed a vertical asymptote at x = 3.