Math Problem Statement

The graph shows a function f(x) with multiple critical points. Identify the critical numbers, local maxima, and minima based on the graph.

Solution

Let's analyze the graph and questions based on the image you provided.

Question 1: Critical numbers of f(x)f(x)

Critical numbers occur where the derivative f(x)=0f'(x) = 0, which is at points where the graph has horizontal tangents (local maxima, minima, or points of inflection). From the graph, these points appear to be approximately:

  • x1.7x \approx -1.7 (local minimum)
  • x0.5x \approx -0.5 (local maximum)
  • x1.2x \approx 1.2 (local minimum)
  • x2.6x \approx 2.6 (local maximum)

Therefore, the correct option is (b) Approximately x=1.7,0.5,1.2,x = -1.7, -0.5, 1.2, and 2.62.6.


Question 2: xx-coordinates corresponding to local maximum

From the graph, local maxima occur where the function changes from increasing to decreasing. These points are approximately at:

  • x0.5x \approx -0.5
  • x2.6x \approx 2.6

The correct option is (b) x=0.5x = -0.5 and 2.62.6.


Question 3: xx-coordinates corresponding to local minimum

Local minima occur where the function changes from decreasing to increasing. These points are approximately at:

  • x1.7x \approx -1.7
  • x1.2x \approx 1.2

The correct option is (a) x=1.7x = -1.7 and 1.21.2.


Let me know if you need any further clarifications!

Here are some follow-up questions for deeper understanding:

  1. How can we determine critical points without the graph?
  2. What is the relationship between concavity and local extrema?
  3. How can the second derivative test be used to confirm local maxima or minima?
  4. What is the importance of knowing the critical points in real-world applications?
  5. How do inflection points differ from critical points?

Tip: Remember, critical points occur where the derivative is zero or undefined, and examining the change in signs of f(x)f'(x) helps identify maxima and minima.

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Math Problem Analysis

Mathematical Concepts

Calculus
Critical Points
Derivatives
Local Extrema

Formulas

f'(x) = 0 for critical points

Theorems

First Derivative Test
Second Derivative Test

Suitable Grade Level

High School (Grades 11-12)