Mathematics

Problem

For the function

f(x)=\dfrac{2x}{x^{2}-9}

, at which

x

-values does the graph of

f

have vertical asymptotes? a)

x=3

\text{ only} b)

x=-3 \text{ and } x=3

c) \text{The function has no vertical asymptotes} d)

x=0

\text{ only}