Question

If S = {integers} and subset B = {positive integers}, what is B'?
Answer
{ }
{…,-3, -2, -1}
{integers}
{1, 2, 3, 4, …}

Answer 1

B' is the set of everything but the stuff found in set B

So B' = set of negative integers = {..., -3, -2, -1}

Answer 2

you should also include zero

Answer 3

Good point...hmm wonder why none of the choices have that