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
.
.
\
is in lowest terms.
The rational function is .
Change to
.
.
Find the intercepts.
\To find intercept equate numerator to
.
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 .
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
.
Oblique asymptote :
\If the degree of the numerator is grater than the degree of denominator then
\Oblique asymptote exist.
\Thus, the function has no oblique asymptote.
\The horizontal asymptote is .
Graph :
\Graph the function with its horizontal and vertical asymptotes.
\ \ \
The zeros in the numerator is and
.
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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| \
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Value of | \
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\ \ | \
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Location of graph \ | \
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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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End behavior of the graph:
\ and
.
\
and
.
Graph :
\The graph of :
\
The graph rational function :