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
Problem 120
Textbook Question
Use the table to evaluate each expression, if possible. (f-g)(3)
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1
<insert step 1> Identify the functions f(x) and g(x) from the table.>
<insert step 2> Find the values of f(3) and g(3) from the table.>
<insert step 3> Use the formula for (f-g)(x) = f(x) - g(x) to set up the expression (f-g)(3) = f(3) - g(3).>
<insert step 4> Substitute the values of f(3) and g(3) into the expression.>
<insert step 5> Simplify the expression to find the result of (f-g)(3).>
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Function Evaluation
Function evaluation involves substituting a specific input value into a function to determine its output. In this case, evaluating (f-g)(3) requires calculating the difference between the values of functions f and g at the input of 3. Understanding how to evaluate functions is crucial for solving problems that involve operations on functions.
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Operations on Functions
Operations on functions include addition, subtraction, multiplication, and division of two or more functions. The expression (f-g)(x) represents the subtraction of function g from function f. Mastery of these operations is essential for manipulating and combining functions to find new outputs based on existing ones.
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Function Notation
Function notation is a way to represent functions and their outputs clearly. For example, f(x) denotes the output of function f for input x. Understanding function notation is vital for interpreting expressions like (f-g)(3), as it clarifies which functions are being used and how they relate to each other.
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