Table of contents
- 0. Fundamental Concepts of Algebra3h 29m
- 1. Equations and Inequalities3h 27m
- 2. Graphs1h 43m
- 3. Functions & Graphs2h 17m
- 4. Polynomial Functions1h 54m
- 5. Rational Functions1h 23m
- 6. Exponential and Logarithmic Functions2h 28m
- 7. Measuring Angles40m
- 8. Trigonometric Functions on Right Triangles2h 5m
- 9. Unit Circle1h 19m
- 10. Graphing Trigonometric Functions1h 19m
- 11. Inverse Trigonometric Functions and Basic Trig Equations1h 41m
- 12. Trigonometric Identities 2h 34m
- 13. Non-Right Triangles1h 38m
- 14. Vectors2h 25m
- 15. Polar Equations2h 5m
- 16. Parametric Equations1h 6m
- 17. Graphing Complex Numbers1h 7m
- 18. Systems of Equations and Matrices3h 6m
- 19. Conic Sections2h 36m
- 20. Sequences, Series & Induction1h 15m
- 21. Combinatorics and Probability1h 45m
- 22. Limits & Continuity1h 49m
- 23. Intro to Derivatives & Area Under the Curve2h 9m
5. Rational Functions
Asymptotes
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Find the horizontal asymptote of each function.
f(x)=2x2−x−68x2+1
A
Horizontal Asymptote at y=0
B
Horizontal Asymptote at y=41
C
Horizontal Asymptote at y=4

1
Identify the degrees of the polynomials in the numerator and the denominator. The degree of the numerator is 2 (from 8x^2), and the degree of the denominator is also 2 (from 2x^2).
Since the degrees of the numerator and the denominator are equal, the horizontal asymptote is determined by the ratio of the leading coefficients.
The leading coefficient of the numerator is 8, and the leading coefficient of the denominator is 2.
Divide the leading coefficient of the numerator by the leading coefficient of the denominator to find the horizontal asymptote: \( \frac{8}{2} \).
The horizontal asymptote is \( y = 4 \).
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