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To analyze: the given rational function.
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Answer to Problem 24RE
Explanation of Solution
Given:
Calculation:
Let us consider the following rational function,
analyze the graph of the given function.
For this follow the following steps:
Step
Determination the domain of the function. Domain of a function is defined as the set of values of
So, let us first find the values of
So, at
Therefore, the domain of the function is
Step
Write
Here, since there is no common factor between the numerator and the denominator,
Step
Next, approximate
So,
Since there is only one zero of the numerator, there is only one
Also, since
Step
Determine whether the function is odd, even or neither.
A function is even if,
Also, a function is odd if,
So, let us first find the values of
Therefore, the function is not odd.
Also,
Therefore, the function is not even
Therefore, the function is neither odd nor even.
So, the graph is neither symmetric about
Step
Find the vertical asymptotes.
The vertical asymptotes of a rational function are located at the real zeros of the denominator.
As found above, the real zero of the denominator here is
So, the vertical asymptote of the function lies at
Step
Find the horizontal or oblique asymptotes. Also, locate the points where the asymptote intersects the graph.
Here, the degree of the numerator and the denominator is same. Therefore, this is an improper rational function. So, to find the horizontal asymptotes, use the long division method.
So,
Here, as
Therefore, the horizontal asymptote of the function lies at
To determine where the graph intersects the horizontal asymptote, solve
So,
This is not defined.
So, the graph doesn’t intersect the horizontal asymptote.
Step
Graph
Step
Complete the graph using all the above information.
Conclusion:
Therefore,the given polynomial function is analyzed.
Chapter 4 Solutions
Precalculus
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