Explain why, after cancelling a common factor from a rational function, the…

MATHEMATICS · Subjective · AP · AP Precalculus · Polynomial and Rational Functions · Polynomial and Rational Functions

Problem

Explain why, after cancelling a common factor from a rational function, the corresponding x-value must still be excluded from the domain. What kind of point appears on the graph at that x-value?

Related theory

Browse the problem library