What is the interval form of 5 < x < 9?
Answer and explanation
Correct answer: (5, 9)
The inequality 5 < x < 9 describes all real numbers greater than 5 and less than 9. Because both inequalities are strict, neither endpoint is included. In interval notation, an excluded endpoint is shown with a round parenthesis, so the correct interval is (5, 9). Square brackets would incorrectly include the corresponding endpoint.
Frequently asked questions
What is the correct answer to this question?
(5, 9)
Why is this the correct answer?
The inequality 5 < x < 9 describes all real numbers greater than 5 and less than 9. Because both inequalities are strict, neither endpoint is included. In interval notation, an excluded endpoint is shown with a round parenthesis, so the correct interval is (5, 9). Square brackets would incorrectly include the corresponding endpoint.
Which subject and chapter does this question cover?
This is a Class 10 Mathematics question. Chapter: Sets. Topic: Equal sets and Subsets.
