Exams › JEE Advanced › Maths
Which of the following is a null (empty) set?
- A = {x: x > 1 and x < 1}
- B = {x: x + 3 = 3}
- C = {phi}
- D = {x: x >= 1 and x <= 1}
Correct answer: A = {x: x > 1 and x < 1}
Solution
Set A requires x to be simultaneously greater than 1 and less than 1, which is impossible for any real number, making A the empty set.
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