Question

Which set is closed under the operation multiplication?


A.


{1}


B.


{1, 2, 3}


C.


{1, 2}


D.


{0, 1, 2}

Answer 1

can u explain it for me?

Answer 2

A set is closed under multiplication if you take any members of that set and multiply them, the product (answer when you multiply them) will be inside the set.

Answer 3

The set {1,2} is NOT closed under multiplication because if you multiply 2 x 2, the product, 4, is not inside that set. You can even multiply a number by itself, or any two different numbers inside the set.