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
Intro to Functions & Their Graphs
1:16 minutes
Problem 62`
Textbook Question
Textbook QuestionLet ƒ(x)=-3x+4 and g(x)=-x^2+4x+1. Find each of the following. Simplify if necessary. See Example 6. g(-x)
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Function Notation
Function notation is a way to represent mathematical functions using symbols. In this context, ƒ(x) and g(x) denote two different functions, where 'x' is the input variable. Understanding how to read and interpret function notation is essential for evaluating functions at specific values, such as g(-x).
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Evaluating Functions
Evaluating a function involves substituting a specific value for the variable in the function's expression. For example, to find g(-x), you replace 'x' in the function g(x) with '-x'. This process is crucial for determining the output of the function based on the given input, which is a fundamental skill in algebra.
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Simplifying Expressions
Simplifying expressions is the process of reducing a mathematical expression to its simplest form. This may involve combining like terms, factoring, or applying algebraic identities. In the context of finding g(-x), simplifying the resulting expression is important to present the final answer clearly and concisely.
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