Question

Help please i'm not sure what it's asking for.

Which set is closed under the operation multiplication?


A.


{1, 2}


B.


{1, 2, 3}


C.


{0, 1, 2}


D.


{1}

Answer 1

@ganeshie8

Answer 2

I believe it's D.

Answer 3

thank you can you tell me how you got that?

Answer 4

If you try multiplying the highest # by itself, that answer will determine whether it's closed or not closed. For example, D your going to multiply 1x1 and you get 1. With A, multiply 2x2 and you get 4, but 4 is not in there, just 1 and 2. That's why A wouldn't be closed.

Answer 5

???

Answer 6

i get it now thank you!!!

Answer 7

If you multiply 2 #'s from a closed set, the answer is in the set. So A is not closed because 2x2=4 and 4 isn't in the set.

Answer 8

Does this make sense?

Answer 9

yes thank you

Answer 10

Your welcome (: