Math Problem Statement

Solve the inequality for x and identify the graph of its solution: |x + 1| > 2

Solution

Let's solve the inequality x+1>2|x + 1| > 2.

Step 1: Break down the absolute value inequality

The expression x+1>2|x + 1| > 2 can be rewritten as two separate inequalities:

  1. x+1>2x + 1 > 2
  2. x+1<2x + 1 < -2

Step 2: Solve the two inequalities

  1. x+1>2x + 1 > 2

    • Subtract 1 from both sides: x>1x > 1
  2. x+1<2x + 1 < -2

    • Subtract 1 from both sides: x<3x < -3

Step 3: Combine the results

The solution is x>1x > 1 or x<3x < -3. This is a disjunction (union), so the solution includes values where either x>1x > 1 or x<3x < -3.

Step 4: Identify the correct graph and solution

Looking at the provided options:

  • Option B: "Solution: x<3x < -3 or x>1x > 1" correctly matches the solution from our work. The graph in Option B shows open circles at x=3x = -3 and x=1x = 1, with arrows extending to the left for x<3x < -3 and to the right for x>1x > 1, which is correct.

Thus, the correct answer is Option B.

Do you need further details or have any other questions?


Related Questions:

  1. How do you solve inequalities involving absolute values?
  2. What are the rules for solving compound inequalities?
  3. How do you graph inequalities on a number line?
  4. What is the difference between "and" and "or" in compound inequalities?
  5. How does an absolute value inequality differ from a regular inequality?

Tip:

When solving absolute value inequalities, always split them into two cases—one for the positive scenario and one for the negative scenario.

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Math Problem Analysis

Mathematical Concepts

Absolute Value
Inequalities
Algebra

Formulas

|x + 1| > 2 implies two inequalities: x + 1 > 2 and x + 1 < -2

Theorems

Properties of absolute values
Basic rules for inequalities

Suitable Grade Level

Grades 8-10