Question

The line x=c is a veritcal asymptote of the graph of the function f Which of the following statements cannot be true?
A. Lim as x approaches c from the left f(x)= infinity
B. lim as x apporaches infinity f(x)=c
C. f(c) is undefined
D. f is continous at x=c

Is it A

Answer 1

huh? isn't that what asymptotes do? Consider y = 1/(x-c)

Answer 2

When the line x=c is a vertical asymptote of the graph of a function f(x) ?