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Questions and Answers
What is the definition of the domain of a function?
What is the definition of the domain of a function?
Which statement correctly describes the range of a function?
Which statement correctly describes the range of a function?
What does the end behavior of a function refer to?
What does the end behavior of a function refer to?
Which of the following describes the 'image' of a function?
Which of the following describes the 'image' of a function?
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In mathematical notation, what does the closed interval [a, b] represent?
In mathematical notation, what does the closed interval [a, b] represent?
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What notation is used to describe x approaching negative infinity?
What notation is used to describe x approaching negative infinity?
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Which of the following best defines the concept of 'codomain'?
Which of the following best defines the concept of 'codomain'?
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What is incorrect when talking about the concept of infinity in mathematics?
What is incorrect when talking about the concept of infinity in mathematics?
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Study Notes
Functions Overview
- A function establishes a relationship between a set of inputs (domain) and a set of outputs (codomain).
- Each input in the domain corresponds to exactly one output in the codomain, denoted as ( f: X \to Y ) and ( f(x) = y ).
Key Concepts
- Domain: The complete set of possible inputs for the function.
- Codomain: All potential outputs, not necessarily actual outputs.
- Unique Association: Each element in the domain links to precisely one element in the codomain.
Related Concepts
- Range: The actual outputs of the function, defined as ( {y | \forall x \in X, f(x) = y \in Y} ).
- Image: The output corresponding to specific input(s) from the domain, denoted ( f(A) ).
Interval Notation
- Open Interval: Denoted as ( (a, b) ) - includes all ( x ) such that ( a < x < b ).
- Closed Interval: Denoted as ( [a, b] ) - includes all ( x ) such that ( a \leq x \leq b ).
- Half-Open Interval: Denoted as ( [a, b) ) or ( (a, b] ).
End Behavior of Functions
- Describes the function's output as the input values trend towards positive or negative infinity.
- Infinity (( \infty )) is a symbol representing unbounded growth, not a number, leading to the expression ( x \to +\infty ) or ( x \to -\infty ).
Observing Functions Graphically
- Function behavior is often analyzed through graphs, although graph drawing techniques will be covered in calculus.
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Description
This quiz covers the fundamental concepts of functions including definitions of domain, range, and end behavior. Participants will explore the relationships between sets of inputs and outputs, enriching their understanding of mathematical functions and their properties.
