Modulus Inequalities
Overview
A modulus inequality asks not for an exact distance from zero, but for a range of distances: which values lie within a certain reach, or beyond it. The answer is always an interval or a pair of intervals, and once you see the distance picture, deciding which is effortless.
In this lesson you will solve \(|x|
Objectives
- Solve, graphically or algebraically, inequalities involving the modulus, such as k|ax + b| > c and k|ax + b| <= |cx + d|.
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Lesson Note
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Lesson Evaluation
Congratulations on completing the lesson on Modulus Inequalities. Now that youve explored the key concepts and ideas, its time to put your knowledge to the test. This section offers a variety of practice questions designed to reinforce your understanding and help you gauge your grasp of the material.
You will encounter a mix of question types, including multiple-choice questions, short answer questions, and essay questions. Each question is thoughtfully crafted to assess different aspects of your knowledge and critical thinking skills.
Use this evaluation section as an opportunity to reinforce your understanding of the topic and to identify any areas where you may need additional study. Don't be discouraged by any challenges you encounter; instead, view them as opportunities for growth and improvement.
- Solve |x - 3| < 2. A. x < 1 or x > 5 B. 1 < x < 5 C. -5 < x < -1 D. x < 5 Answer: B
- The inequality |x| > c (c > 0) is equivalent to: A. -c < x < c B. x < -c or x > c C. x > c only D. x < c Answer: B
- Solve |2x - 1| > 5. A. -2 < x < 3 B. x < -2 or x > 3 C. x > 3 only D. -3 < x < 2 Answer: B
- Solve 3|x + 1| < 12. A. -5 < x < 3 B. x < -5 or x > 3 C. -4 < x < 4 D. -3 < x < 5 Answer: A
- Which is a valid way to write the solution of |x| > 4? A. -4 > x > 4 B. x < -4 or x > 4 C. -4 < x < 4 D. x = 4 Answer: B
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