The rational function is .
In rational functions the denominator can not be zero.
\To find exceptional values equate denominator to zero.
\
The domain of function is
.
.
.
\
Now is in lowest terms.
The rational function is .
Change to
.
.
Find the intercepts.
\To find -intercept equate numerator to
.
The function has no -intercept.
Find the -intercept by substituting
in the rational function.
.
The -intercept is
.
Find the vertical asymptote by equating denominator to zero.
\
So the function has vertical asymptote at and
.
Graph :
\Graph the function with its horizontal and vertical asymptotes.
\To find horizontal asymptote, first find the degree of the numerator and degree of the denominator.
\Degree of the numerator and degree of the denominator is
.
Since the degree of the numerator and degree of the denominator is
, the horizontal asymptote occurs at
and not intersected.
The horizontal asymptote is .
There are no zeros in the numerator.
\The zeros of denominator are and
, use these values to divide the
axis into three intervals.
.
Interval | \ \
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Number chosen \ | \
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Value of | \
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| \
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\ | \
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| \
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Location of graph \ | \
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Below | \
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Above \ | \
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Below \ \ | \
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Above | \
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Point of graph \ | \
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| \
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\ | \
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| \
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End behavior of the graph:
\ and
.
and
.
and
.
The Rational function does not have horizontal asymptote.
Graph :
\The graph of :
.
\
The graph of the rational function :
.