Question

If N = {all real numbers} and subset S = {multiples of 4 less than zero}, what is S′?

{multiples of 4 greater than zero}

{even numbers less than zero}

{odd numbers less than zero}

{all real numbers excluding multiples of 4 less than zero}

Answer 1

@ivettef365

Answer 2

So you have \(N=\mathbb{R}\) and \(S\subset N\) with \(S=\left\{4n~:~n\in\mathbb{Z}^-\right\}\).
(\(\mathbb{Z}^-\) is meant to represent the set of negative integers).

The set \(S'\) is the set of all elements not in \(S\). This leaves you with every real number that's not a multiple of 4 less than 0. (the last option).