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
3:13 minutes
Problem 47c
Textbook Question
Textbook QuestionFind the value of the function for the given value of x. See Example 3. ƒ(x)=[[x/4]], for x=7
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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, such as f(x), represents a relationship where each input x corresponds to exactly one output. In this case, f(x) = [[x/4]] indicates that we are applying a specific operation to x, which is crucial for evaluating the function at a given value.
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Greatest Integer Function
The notation [[x]] refers to the greatest integer function, also known as the floor function. It rounds down the value of x to the nearest integer. For example, [[3.7]] equals 3, and [[-2.3]] equals -3, which is essential for determining the output of f(x) in this problem.
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Substitution
Substitution is the process of replacing a variable in a function with a specific value to evaluate the function. In this question, we substitute x = 7 into the function f(x) = [[x/4]] to find the corresponding output, which is a fundamental step in solving function-related problems.
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