Math Problem Statement

Which of the following intervals could be part of the solution of the inequality |3x - 3| < 3?

Solution

We are given the inequality:

3x3<3|3x - 3| < 3

Step 1: Solve the inequality

To solve this absolute value inequality, we split it into two inequalities by removing the absolute value:

3<3x3<3-3 < 3x - 3 < 3

Step 2: Solve both sides of the inequality

Now, solve for xx step by step.

  1. Add 3 to all parts of the inequality:

0<3x<60 < 3x < 6

  1. Divide everything by 3:

0<x<20 < x < 2

Step 3: Interpret the solution

This inequality tells us that the solution to 3x3<3|3x - 3| < 3 is xx between 0 and 2 (but not including 0 or 2, since the inequality is strict).

Step 4: Check the provided intervals

Now, let’s look at the options:

  • A. [12,52)\left[\frac{1}{2}, \frac{5}{2}\right): This is not part of the solution, because 52=2.5\frac{5}{2} = 2.5 is outside the valid range 0<x<20 < x < 2.
  • B. [14,32]\left[\frac{1}{4}, \frac{3}{2}\right]: This interval is entirely within 0<x<20 < x < 2, so it could be part of the solution.
  • C. (12,12]\left(-\frac{1}{2}, \frac{1}{2}\right]: This includes x=12x = -\frac{1}{2}, which is outside the valid range, so it's not part of the solution.
  • D. [0,12)\left[0, \frac{1}{2}\right): This interval includes 0, which violates the strict inequality x>0x > 0.

Conclusion:

The correct answer is B. [14,32]\left[\frac{1}{4}, \frac{3}{2}\right], as this interval lies entirely within 0<x<20 < x < 2.

Would you like further clarification or additional details?

Related Questions:

  1. How would the solution change if the inequality were 3x33|3x - 3| \leq 3?
  2. What if the inequality was 3x3>3|3x - 3| > 3? How would that affect the intervals?
  3. How can we graph the solution to 3x3<3|3x - 3| < 3 on a number line?
  4. What method can we use to solve absolute value inequalities in general?
  5. How do strict inequalities affect the endpoints of intervals in solutions?

Tip:

Always remember to handle absolute value inequalities by splitting them into two separate inequalities—one for the positive case and one for the negative case.

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Math Problem Analysis

Mathematical Concepts

Algebra
Absolute Value Inequalities
Interval Notation

Formulas

Absolute Value Inequality: |x - a| < b

Theorems

Properties of Absolute Value Inequalities

Suitable Grade Level

Grades 9-11