Table of contents
- 0. Review of Algebra4h 16m
- 1. Equations & Inequalities3h 18m
- 2. Graphs of Equations43m
- 3. Functions2h 17m
- 4. Polynomial Functions1h 44m
- 5. Rational Functions1h 23m
- 6. Exponential & Logarithmic Functions2h 28m
- 7. Systems of Equations & Matrices4h 6m
- 8. Conic Sections2h 23m
- 9. Sequences, Series, & Induction1h 19m
- 10. Combinatorics & Probability1h 45m
5. Rational Functions
Graphing Rational Functions
2:39 minutes
Problem 55
Textbook Question
Textbook QuestionIn Exercises 45–56, use transformations of f(x)=1/x or f(x)=1/x^2 to graph each rational function. h(x)=1/(x−3)^2+1
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Rational Functions
Rational functions are expressions formed by the ratio of two polynomials. They can exhibit unique behaviors such as asymptotes, intercepts, and discontinuities. Understanding the structure of rational functions is essential for analyzing their graphs, particularly how they behave near their vertical and horizontal asymptotes.
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Transformations of Functions
Transformations involve shifting, reflecting, stretching, or compressing the graph of a function. For example, the function h(x) = 1/(x−3)^2 + 1 represents a vertical shift and a horizontal shift of the basic function f(x) = 1/x^2. Recognizing these transformations helps in accurately sketching the graph of the function based on its parent function.
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Asymptotes
Asymptotes are lines that a graph approaches but never touches. For rational functions, vertical asymptotes occur where the denominator is zero, while horizontal asymptotes indicate the behavior of the function as x approaches infinity. Identifying these asymptotes is crucial for understanding the overall shape and limits of the graph of a rational function.
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