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

@ranga

Answer 2

Can something be less than zero AND also be greater than zero?

Answer 3

no

Answer 4

so it C again cuz thats {x | x ≤ 0} OR {x | x ≥ 0}

Answer 5

u there

Answer 6

The first choice is saying: x < 0 AND x > 0 That can't be true for any value of x.

The second choice is saying: x <=0 AND x >= 0. There is one value of x that can satisfy both inequalities and that is x = 0. So there is a solution.

The third choice is saying: x <= 0 OR x >= 0 This has infinite solutions because it is an OR. Any value of x can satisfy one or the other.

Answer 7

so is it A

Answer 8

Yes.

Answer 9

oh ok