en.wikipedia.org/wiki/Asymptote

In analytic geometry, an asymptote of a curve is a line such that the distance between the curve .... A common example of a vertical asymptote is the case of a rational function at a point x such that the denominator is zero and the numerator is ...

www.purplemath.com/modules/asymtote4.htm

Uses worked examples to demonstrate how to recognize and find vertical, horizontal, and slant asymptotes, along with the domain of a function.

www.purplemath.com/modules/asymtote.htm

Uses worked examples to demonstrate how to find vertical asymptotes. Stresses the relation between vertical asymptotes and the domain of the function.

www.softschools.com/math/calculus/finding_horizontal_asymptotes_of_rational_functions

Remember that an asymptote is a line that the graph of a function approaches but never touches. Rational functions contain asymptotes, as seen in this example ...

www.mathsisfun.com/algebra/asymptote.html

An asymptote is a line that a curve approaches, as it heads towards infinity: Asymptote ... It is a Horizontal Asymptote when: as x goes ... Example: (x2−3x)/(2x −2).

www.onlinemathlearning.com/asymptote.html

Calculus: How to find Vertical Asymptote, Horizontal Asymptote and Oblique Asymptote, examples and step by step solutions, For rational functions, vertical ...

github.com/vectorgraphics/asymptote/tree/master/examples

2D & 3D TeX-Aware Vector Graphics Language. Contribute to asymptote development by creating an account on GitHub.

www.shmoop.com/precalc-polynomials/horizontal-examples.html

Examples · Rational Root Theorem · Restricting the Roots · Multiplicity · Sketching Polynomials · Vertical Asymptotes and Discontinuities; Horizontal and Slant ...

math.tutorvista.com/geometry/asymptote.html

An asymptote is a straight line at a finite distance from the origin to which distance a tangent to a curve tends as the distance from the origin of the point of contact ...