if x < -2 4, if -2 < x< 2 42. K(x) = x2 - 1 -x, 2 if x > 2

Algebra and Trigonometry (6th Edition)
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ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:Robert F. Blitzer
ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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Graph the function, insert solid circles or open circles where necessary to indicate the true nature of the function

### Piecewise Function Example

The function \( K(x) \) is defined as a piecewise function with three different expressions depending on the value of \( x \):

\[
K(x) =
\begin{cases} 
1, & \text{if } x \leq -2 \\
x^2 - 4, & \text{if } -2 < x < 2 \\
\frac{1}{2}x, & \text{if } x \geq 2 
\end{cases}
\]

- When \( x \) is less than or equal to -2, \( K(x) \) is equal to 1.
- When \( x \) is greater than -2 but less than 2, \( K(x) \) is represented by the quadratic equation \( x^2 - 4 \).
- When \( x \) is greater than or equal to 2, \( K(x) \) is equal to half of \( x \).

This type of function is called a piecewise function because it is defined by different expressions for different intervals of the domain.
Transcribed Image Text:### Piecewise Function Example The function \( K(x) \) is defined as a piecewise function with three different expressions depending on the value of \( x \): \[ K(x) = \begin{cases} 1, & \text{if } x \leq -2 \\ x^2 - 4, & \text{if } -2 < x < 2 \\ \frac{1}{2}x, & \text{if } x \geq 2 \end{cases} \] - When \( x \) is less than or equal to -2, \( K(x) \) is equal to 1. - When \( x \) is greater than -2 but less than 2, \( K(x) \) is represented by the quadratic equation \( x^2 - 4 \). - When \( x \) is greater than or equal to 2, \( K(x) \) is equal to half of \( x \). This type of function is called a piecewise function because it is defined by different expressions for different intervals of the domain.
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