a function that is expressed as the ratio of two polynomials

a function that looks like a fraction

a function which is the ratio of two polynomials

a function whose value is given by a rational expression

Functions constructed using the roots or quotients of polynomials. Example: f(x) = x1/2 g(x) = (2x3 - 4x2 + 2) / (x2 + 1)

A ratio of two polynomial functions, , where .

In mathematics, a rational function is any function whose output can be given by a formula that is the ratio of two polynomials.