Chapter 4: Functions

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4.1 Definition of functions

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Definition 4.1.1: Functions.

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Function equality

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4.1.6: Determining whether two functions are equal.

4.2 Floor and ceiling functions

The floor function

The ceiling function

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4.3.2: Properties of algebraic functions.

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4.3.3: Function properties and the relative sizes of the domain and target.

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4.4 The inverse of a function

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4.5 Composition of functions

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4.6 Logarithms and exponents

Figure 4.6.1: Properties of exponents.

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Example 4.6.1: Exponential functions and population growth.

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Dividing a pile of chocolate

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3) Suppose that Ingrid has 63

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