Math Problem Statement
Identify the rational function.
Solution
To identify the rational function, we need to consider the zeros, vertical asymptotes, and the general behavior of the function.
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Zeros: The rational function has zeros at , , and . This means the numerator of the function has factors , , and .
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Vertical Asymptotes: By examining the graph, there are vertical asymptotes at and . This indicates that the denominator of the function has factors and .
Considering these points, the rational function can be written in the form: where is a constant that determines the vertical stretch or compression.
Determining
We can determine by using another point from the graph. Let's use point as this point does not correspond to a zero or a vertical asymptote.
Substituting and : Since this point appears at and the y-value is given, and is a point of discontinuity (a vertical asymptote), there must be another point used instead.
Alternative: Using Limits
We can use a point that doesn't cause the denominator to be zero, but instead, we use the behavior at . Since we need to use a non-zero vertical asymptote behavior, we can use points near asymptotes to determine the proportionality constant, ensuring a correct limit. Using other points will ensure the correct definition:
Thus,
So, the rational function is:
Would you like more details or have any questions?
Here are some related questions you might want to ask:
- How do you determine if the rational function has any horizontal asymptotes?
- What happens to the function as approaches the vertical asymptotes?
- How do you find the y-intercept of a rational function?
- How can you determine the end behavior of a rational function?
- What are the steps to graph a rational function?
Tip: Always verify the function by checking critical points and behavior at asymptotes. This ensures the function matches the graph correctly.
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Math Problem Analysis
Mathematical Concepts
Rational functions
Zeros of functions
Vertical asymptotes
Formulas
Rational function form: f(x) = k * (x - a1)(x - a2)... / (x - b1)(x - b2)...
Theorems
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Suitable Grade Level
Grades 10-12
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