Question

Which of the following has no solution?
(x + 1 < -1) ∩ (x + 1 < 1)
(x + 1 ≤ 1) ∩ (x + 1 ≥ 1)
(x + 1 < 1) ∩ (x + 1 > 1)

Answer 1

last one simplifies to (x < 0) ∩ (x > 0)

Answer 2

okay, so it's not the second one because its less/morethan or equal too, so it can work.. (:

Answer 3

yes