Question

If T = {integers} and subset W = {positive integers}, what is W′?

{1, 2, 3, …}

{…−3, −2, −1}

{−3, −2, −1, 0}

{ }

Answer 1

W' is the set of everything you find in set T but you kick out everything found in set W

Answer 2

ie. you start with set T = {integers} and you erase all the positive integers since W = {positive integers}