Question

Which of the following set is empty ?

Select one:

{x:x≠x}

{x:x=x}

{x:x≠x2}

{x:x=x2}

Answer 1

Correct option is (a) {x:x≠x}

In mathematical notation, the symbol {x:x≠x} represents the set of all x such that x does not equal x. Since no value of x can satisfy this condition, the set is empty.