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
3. Functions
Function Operations
2:40 minutes
Problem 19a
Textbook Question
Textbook QuestionFor the pair of functions defined, find (f/g)(x).Give the domain of each. See Example 2. ƒ(x)=3x+4, g(x)=2x-8
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Function Division
Function division involves creating a new function by dividing one function by another. In this case, (f/g)(x) is defined as f(x) divided by g(x), which means you will compute (3x + 4) / (2x - 8). Understanding how to manipulate and simplify rational functions is crucial for solving such problems.
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Domain of a Function
The domain of a function refers to the set of all possible input values (x-values) for which the function is defined. For the function (f/g)(x), the domain must exclude any values that make the denominator zero, as division by zero is undefined. In this case, you need to find the value of x that makes g(x) = 0.
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Rational Functions
Rational functions are functions that can be expressed as the ratio of two polynomials. They often exhibit specific behaviors, such as asymptotes and discontinuities, based on the values of the numerator and denominator. Understanding the characteristics of rational functions helps in analyzing their graphs and determining their domains.
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