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**2.3 Introduction to Functions**

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**Definition of a Function**

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Domain and Range

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**Ex 1: Determine whether each relation is a function.**

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Solution for part (a) 4 6 8 5 7 8

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Solution for part (b) 4 5 6 6 7

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Practice Exercises

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Answers

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Function Notation

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Function Notation

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**Ex 2: Determine whether each equation defines y as a function of x.**

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Solution

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Solution continued

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Solution of 2

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Practice Exercises

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Answers

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**Ex 3: Evaluating a Function**

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Solution part a.

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Solution part b.

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Solution part c.

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Practice Exercise

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Answer

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Piecewise Functions

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**Ex 4: Evaluating a Piecewise Function**

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Solution part a

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Solution part b

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Solution part c

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Practice Exercise

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Answer

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**Finding a Function’s Domain**

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**Finding a Function’s Domain**

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**Ex 5: Find the domain of each function**

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Solution part a

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Solution part b

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Solution part c

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Practice Exercises

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Answers

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