Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 2 - Section 2.1 - Complex Numbers - Exercise Set - Page 315: 84

Answer

The domain and range for the function $y=f\left( x \right)$ are $\left[ 0,2 \right)$ and $\left[ 0,2 \right]$respectively.

Work Step by Step

Observe the graph of the function,$y=f\left( x \right)$ According to the definition of the domain, it is the set of all the input values -- that is, the values taken for the variable x for the function $y=f\left( x \right)$. These values are plotted on the x-axis. According to the definition of range, it is the set of all the output values -- that is, the values obtained for the variable y for the function$y=f\left( x \right)$. These values are plotted on the y-axis. A black dot on the graph means that the particular point is included whereas a white dot means that the particular point is not included. The function $y=f\left( x \right)$ takes the value from 0 to 2 but 2 is not included. Therefore, the domain of the function is $\left[ 0,2 \right)$. The function $y=f\left( x \right)$ gives the value from 0 to 2 and 2 is not included. Therefore, the range of the function is $\left[ 0,2 \right]$. Thus, the domain and range for the function $y=f\left( x \right)$ are $\left[ 0,2 \right)$ and $\left[ 0,2 \right]$ respectively.
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