Math Problem Statement

Find all values of x for which f(x) > 0 based on the graph of the function f(x).

Solution

The problem displayed asks: "Find all values of xx for which f(x)>0f(x) > 0" based on the graph of the function f(x)f(x) shown.

Analysis:

From the graph, you need to determine where the function f(x)f(x) is greater than zero (i.e., where the graph is above the x-axis). Here's how to analyze it:

  1. Identify the x-intercepts: The points where the graph crosses the x-axis are the values of xx where f(x)=0f(x) = 0.

  2. Determine intervals where f(x)>0f(x) > 0: Look for sections of the graph that lie above the x-axis. These will be the intervals of xx for which f(x)>0f(x) > 0.

Based on the graph in the image:

  • The function appears to cross the x-axis at two points. Let’s approximate these points.
    • The graph crosses the x-axis at around x=2x = -2 and x=2x = 2.

Conclusion:

  • The function is positive (i.e., f(x)>0f(x) > 0) for the interval between the two x-intercepts, meaning f(x)>0f(x) > 0 for 2<x<2-2 < x < 2.

Thus, the solution is:

2<x<2-2 < x < 2

Would you like further details or have any questions? Here are some related questions you might find useful:

  1. How do we calculate x-intercepts algebraically?
  2. What is the difference between f(x)>0f(x) > 0 and f(x)0f(x) \geq 0?
  3. How would this change if the function were shifted vertically?
  4. What happens if the function dips below the x-axis for a larger interval?
  5. How do you determine concavity from the graph?

Tip: Always check the points where the function crosses the x-axis carefully, as they help you determine when a function is positive or negative.

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Math Problem Analysis

Mathematical Concepts

Graphing
Quadratic Functions
Inequalities

Formulas

-

Theorems

Graphing the roots of a quadratic function

Suitable Grade Level

Grades 8-10