Math Problem Statement

Using the given graph of the function​ f, find the following. ​(a) the​ intercepts, if any ​(b) its domain and range ​(c) the intervals on which it is​ increasing, decreasing, or constant ​(d) whether it is​ even, odd, or neither x y negative pipinegative StartFraction pi Over 2 EndFraction StartFraction pi Over 2 EndFraction left parenthesis StartFraction pi Over 2 EndFraction comma 9 right parenthesis left parenthesis negative StartFraction pi Over 2 EndFraction comma negative 9 right parenthesis

A coordinate system has a horizontal x-axis labeled from negative pi to pi in increments of StartFraction pi over 2 EndFraction and an unlabeled vertical y-axis. A periodic curve falls from a plotted point at (negative pi, 0) to a plotted and labeled point at (negative StartFraction pi over 2 EndFraction, negative 9). The curve then rises from left to right through (0, 0) to a plotted and labeled point at (StartFraction pi over 2 EndFraction, 9) where it then falls from left to right to a plotted point at (pi, 0). Question content area bottom Part 1 ​(a) What are the​ intercepts?

Solution

To solve this problem, let's analyze each part based on the given graph description:

(a) The Intercepts

Intercepts are points where the graph crosses the x-axis (x-intercepts) or the y-axis (y-intercept).

  1. X-Intercepts: These occur where the function crosses the x-axis (where y=0y = 0). From the description:

    • The curve passes through the points (π,0)(-π, 0), (0,0)(0, 0), and (π,0)(π, 0).
    • Therefore, the x-intercepts are: (π,0),(0,0), and (π,0).(-π, 0), (0, 0), \text{ and } (π, 0).
  2. Y-Intercept: This occurs where the graph crosses the y-axis (where x=0x = 0).

    • The y-intercept is (0,0)(0, 0).

(b) Domain and Range

  • Domain: The set of all possible x-values.

    • Since the graph is periodic and extends horizontally from π to ππ, the domain is: [π,π].[-π, π].
  • Range: The set of all possible y-values.

    • From the description, the graph reaches a minimum of 9-9 at (π2,9)(- \frac{π}{2}, -9) and a maximum of 99 at (π2,9)(\frac{π}{2}, 9).
    • Therefore, the range is: [9,9].[-9, 9].

(c) Intervals of Increasing, Decreasing, or Constant Behavior

  1. Increasing Intervals:

    • The function is increasing from (π2,9)(- \frac{π}{2}, -9) to (π2,9)(\frac{π}{2}, 9).
    • So, the interval is: (π2,π2).\left(-\frac{π}{2}, \frac{π}{2}\right).
  2. Decreasing Intervals:

    • The function is decreasing from (π,0)(-π, 0) to (π2,9)(- \frac{π}{2}, -9) and from (π2,9)(\frac{π}{2}, 9) to (π,0)(π, 0).
    • So, the intervals are: (π,π2) and (π2,π).(-π, -\frac{π}{2}) \text{ and } (\frac{π}{2}, π).
  3. Constant Intervals:

    • There are no intervals where the function is constant.

(d) Symmetry: Even, Odd, or Neither

  • A function is even if it is symmetric about the y-axis, i.e., f(x)=f(x)f(-x) = f(x).
  • A function is odd if it is symmetric about the origin, i.e., f(x)=f(x)f(-x) = -f(x).

Given the points (π2,9)(- \frac{π}{2}, -9) and (π2,9)(\frac{π}{2}, 9), and the symmetry of the graph about the origin, the function satisfies f(x)=f(x)f(-x) = -f(x).

Therefore, the function is odd.


Would you like more details, or do you have any questions? Here are some related questions to explore:

  1. How can you identify the intercepts of a function graphically?
  2. What is the significance of the domain and range of a function?
  3. How can you determine if a function is increasing, decreasing, or constant?
  4. What are the characteristics of even and odd functions?
  5. How does periodicity affect the properties of a function?

Tip: For functions with symmetry, always check if they satisfy the conditions for being even or odd—it helps to simplify their analysis.

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Graphical Analysis
Intercepts
Domain and Range
Increasing and Decreasing Intervals
Even and Odd Functions

Formulas

X-intercept: f(x) = 0
Y-intercept: f(0)
Domain: set of all x-values
Range: set of all y-values
Even function: f(-x) = f(x)
Odd function: f(-x) = -f(x)

Theorems

Properties of periodic functions
Symmetry in functions
Graph interpretation

Suitable Grade Level

Grades 10-12