In Exercises 81–88, a. Find the slant asymptote of the graph of each rational function and b. Follow the seven-step strategy and use the slant asymptote to graph each rational function. f(x)=(x2+1)/x
Table of contents
- 0. Review of Algebra4h 18m
- 1. Equations & Inequalities3h 18m
- 2. Graphs of Equations1h 43m
- 3. Functions2h 17m
- 4. Polynomial Functions1h 44m
- 5. Rational Functions1h 23m
- 6. Exponential & Logarithmic Functions2h 28m
- 7. Systems of Equations & Matrices4h 5m
- 8. Conic Sections2h 23m
- 9. Sequences, Series, & Induction1h 22m
- 10. Combinatorics & Probability1h 45m
5. Rational Functions
Graphing Rational Functions
Problem 97
Textbook Question
In Exercises 95–98, use long division to rewrite the equation for g in the form quotient + remainder/divisor. Then use this form of the function's equation and transformations of f(x) = 1/x to graph g. g(x)=(3x−7)/(x−2)
Verified step by step guidance1
Identify the dividend and divisor for the long division: the dividend is the numerator polynomial and the divisor is the denominator polynomial .
Set up the long division by dividing the leading term of the dividend by the leading term of the divisor , which gives the first term of the quotient: .
Multiply the entire divisor by the quotient term to get , then subtract this from the dividend to find the remainder.
Calculate the remainder by subtracting: . So the remainder is .
Express the function in the form quotient + remainder/divisor: . Use this form to analyze and graph the function by considering transformations of .
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Polynomial Long Division
Polynomial long division is a method used to divide one polynomial by another, similar to numerical long division. It helps rewrite a rational function as a quotient plus a remainder over the divisor, simplifying the expression for analysis or graphing.
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Introduction to Polynomials
Rational Functions and Their Graphs
Rational functions are ratios of polynomials and often have vertical and horizontal asymptotes. Understanding their behavior, including discontinuities and end behavior, is essential for graphing and interpreting transformations.
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How to Graph Rational Functions
Transformations of the Parent Function f(x) = 1/x
The function f(x) = 1/x serves as a parent rational function with a hyperbola shape. Graphing transformations such as shifts, stretches, and reflections applied to f(x) help visualize the graph of more complex rational functions like g(x).
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