Let , where the function is defined for all real except where the denominator is…
MATHEMATICS · Single correct · AP · Calculus AB · Limits and Continuity · Limits and Continuity
Problem
Let f(x)=x2−4x+3x2−9, where the function is defined for all real x except where the denominator is zero. Which set lists all points of discontinuity of f?
(a) {1}
(b) {−3,1,3}
(c) {1,3}
(d) {1,−1,3}