Math Problem Statement

A) What is the solution to the inequality f(x) > 0? B) What is one x value for which f(x) = 0? C) What is the solution to the inequality f(x) ≥ 0? D) What is the solution to the inequality f(x) ≤ 0?

Solution

Let's analyze the graph and solve the four sub-questions.

The graph shows a function f(x)f(x), and we need to answer the following questions based on its behavior.

Part A: Solution to the inequality f(x)>0f(x) > 0

We need to determine where the function is above the x-axis. From the graph, the function appears to be greater than 0 in two intervals:

  • From x=6x = -6 to x=2x = -2 (the curve is above the x-axis in this range),
  • From x=2x = 2 to xx \to \infty.

So the solution is: f(x)>0for(6,2)(2,)f(x) > 0 \quad \text{for} \quad (-6, -2) \cup (2, \infty)

Part B: One xx-value for which f(x)=0f(x) = 0

From the graph, the function crosses the x-axis at x=1x = 1, so one xx-value for which f(x)=0f(x) = 0 is: x=1x = 1

Part C: Solution to the inequality f(x)0f(x) \geq 0

This includes where the function is greater than or equal to 0, so we add the points where the function touches the x-axis:

  • From x=6x = -6 to x=2x = -2,
  • x=1x = 1 (since f(x)=0f(x) = 0 here),
  • From x=2x = 2 to \infty.

Thus, the solution is: [ f(x) \geq 0 \quad \text{for} \quad [-6, -2] \cup [1, 1] \cup [2, \infty) ]

Part D: Solution to the inequality f(x)0f(x) \leq 0

This includes where the function is less than or equal to 0. The graph is below the x-axis in the intervals:

  • From x=2x = -2 to x=1x = 1.

So the solution is: f(x)0for[2,1]f(x) \leq 0 \quad \text{for} \quad [-2, 1]

Let me know if you need more details or have any questions! Here are 5 related questions you might consider:

  1. How do you determine the intervals where f(x)f(x) is positive or negative?
  2. How do you handle inequalities when the function touches the x-axis at specific points?
  3. What are the differences between solving f(x)>0f(x) > 0 and f(x)0f(x) \geq 0?
  4. Can a function be positive and negative on the same interval?
  5. How can you use the graph of the derivative of a function to solve inequalities like these?

Tip: Always pay attention to the open and closed intervals when solving inequalities involving f(x)f(x) because it indicates whether the value at the boundary is included or not!

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Math Problem Analysis

Mathematical Concepts

Inequalities
Graphing Functions
Interval Notation

Formulas

f(x) > 0
f(x) ≥ 0
f(x) ≤ 0

Theorems

Zeroes of a function
Inequalities on intervals

Suitable Grade Level

Grades 10-12