Question

How do you write "A is the set of even whole numbers that are less than 18" in roster form? How do you write A using set-builder notation?

Answer 1

Roster notation is just a list, so it will look like\[A={2, 4, 6, ..., 16}\]

Answer 2

ok. so that's it?

Answer 3

Set builder notation is a description of the set, instead of a list. You might describe it like\[A=\left\{ n=2k| k=1, 2, 3, ..., 8 \right\}\]

Answer 4

That isn't as clear as I would like; try again...

A={ n=2k| k=1, 2, 3, ..., 8 }

Answer 5

Okay.