Question

If U = {positive integers} and subset M = {positive odd integers}, what is M'?

{positive integers}

{ }

{1, 3, 5, 7, …}

{2, 4, 6, 8, …}

Answer 1

\(M'\) means all elements not in \(M\). If \(M\) is the positive _odd_ integers, then what other positive integers are there?

Answer 2

1357

Answer 3

\(\{1,3,5,7,\dots\}\) is the set of positive odd integers. In other words, it is \(M\). So, it can't be what's not in \(M\).

What else can you choose from?

Answer 4

{ } OR {positive integers}

Answer 5

You also have \(\{2,4,6,8,\dots\}\).

Of \(\{\}\), \(\{\text{ positive integers }\}\), and \(\{2,4,6,8,\dots\}\), which one of these does not have any of \(\{1,3,5,7,\dots\}\)?

Answer 6

2468

Answer 7

Correct.

Answer 8

Good job.