The curve is
,
.
Graph :
\Graph the curve
:

Vertical asymptote :
\The vertical asymptote is a line equation, toward which a function
approaches to either positive or negative infinity.
Observe the graph.
\The vertical asymptotes are
and
.
The curve is
.
Find the vertical asymptote.
\Rewrite the curve.
\
.
Vertical asymptote are vertical lines which correspond to the zeroes of the denominator of a rational function.
\To find the vertical asymptote, equate denominator of the function to zero.
\So 

The general solution for
is
, where
is an integer.
If
then
.
If
then
.
The vertical asymptote are
and
.
The vertical asymptotes are 
The exact vertical asymptotes are
.