The rational function is
.
Factorize the numerator and denominator.
\

.
The domain of the function is all possible values of
.
The denominator of the function should not be zero.
\
and
.
The domain of the
is the set of all real numbers
except
and
.
The domain of function
is
.
\
.
There are no common factors between the numerator and denominator,
\
is in lowest terms.
\
The rational function is
.
Change
to
.
.
Find the intercepts.
\Find the
intercepts by equating
.
.
The polynomial equation has imaginary roots.
\There is no
-intercepts.
Find the
- intercept by substituting
in
.


-intercept is
.
\
Find the vertical asymptote by equating denominator to zero.
\
The function has vertical asymptotes at
and
.
\
Find the horizontal or oblique asymptote.
\
Degree of the numerator is
and degree of the denominator is
.
Since the degree of the numerator is greater degree of the denominator,
\then
is improper.
Since the degree of numerator is
or more greater than the degree of denominator
the function has no horizontal or oblique asymptote.
\\
There are no zeros of the numerator: the zeros of the denominator is
and
.
Use these values to divide the
-axis into three intervals:
,
and
.
.gif\")
| Interval | \ \
| \
\
| \
Location of graph | \ \
| \
| \
| \
\
| \
\
| \
\
Above | \
\
| \
| \
| \
\
| \
\
\
| \
\
Below | \
\
| \
| \
| \
\
| \
\
| \
\
Above | \
\
| \
End behavior of the graph:
\
and
.
and
.
The rational function
does not have horizontal asymptote.
does not intersect the vertical asymptotes
and
.
Graph :
\The graph of
:
Step 1:
; Domain of
is
.
Step 2:
is in lowest terms.
Step 3:
intercept:
; no
-intercept.
Step 4:
is in lowest terms; vertical asymptotes:
and
.
Step 5: No horizontal or oblique asymptote.
\Step 6:
\.gif\")
| Interval | \ \
\
| \
\
| \
Location of graph | \ \
\
| \
| \
| \
\
| \
\
| \
\
Below | \
\
\
| \
| \
| \
\
\
| \
\
\
| \
\
Below | \
\
\
| \
| \
| \
\
\
| \
\
| \
\
Above | \
\
| \
Step 7 and step 8:
\Graph of
.