Question

Which of the following is an empty set ?

• A. {x : x² - 9 = 0, x ∈ R}
• B. {x : x² - 1 = 0, x ∈ R}
• C. {x : x² = x + 2, x ∈ R}
• D. {x : x² + 1 = 0, x ∈ R}

Answer 1

The Correct Option is D

The correct answer is (D) : {x : x² + 1 = 0, x ∈ R}.