Question

Which of the following has no solution?

{x | x < 0} and {x | x > 0}
{x | x ≤ 0} and {x | x ≥ 0}
{x | x ≤ 0} or {x | x ≥ 0}

Answer 1

What do you think?

Answer 2

i think its the first one

Answer 3

Let's look at first option.

Because of "and," both have to be true.

Can both x < 0 and x > 0 be true?

Answer 4

Yep

Answer 5

Impossible for x to be smaller than 0 and larger than 0 simultaneously.