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
6. Exponential & Logarithmic Functions
Introduction to Logarithms
3:29 minutes
Problem 69
Textbook Question
Textbook QuestionThe figure shows the graph of f(x) = ln x. In Exercises 65–74, use transformations of this graph to graph each function. Graph and give equations of the asymptotes. Use the graphs to determine each function's domain and range. g(x) = 2 ln x
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Logarithmic Functions
Logarithmic functions, such as f(x) = ln x, are the inverses of exponential functions. They are defined for positive real numbers and have unique properties, including a vertical asymptote at x = 0. Understanding the basic shape and behavior of the natural logarithm is essential for analyzing transformations and their effects on the graph.
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Graphs of Logarithmic Functions
Transformations of Functions
Transformations of functions involve shifting, stretching, compressing, or reflecting the graph of a function. For example, the function g(x) = 2 ln x represents a vertical stretch of the graph of f(x) = ln x by a factor of 2. Recognizing how these transformations affect the graph's position and shape is crucial for accurately graphing the new function.
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Domain & Range of Transformed Functions
Asymptotes
Asymptotes are lines that a graph approaches but never touches. For logarithmic functions, there is typically a vertical asymptote at x = 0, indicating that the function is undefined for non-positive values. Identifying asymptotes helps in determining the domain and range of the function, which are essential for understanding its behavior and limits.
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Introduction to Asymptotes
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