Which set is closed under the operation multiplication?

A.

{1}

B.

{1, 2, 3}

C.

{1, 2}

D.

{0, 1, 2}

Question

Which set is closed under the operation multiplication? 	
	
 
A.
	

{1}
	
 
B.
	

{1, 2, 3}
	
 
C.
	

{1, 2}
	
 
D.
	

{0, 1, 2}

anonymous · Answer

can u explain it for me?

anonymous · Answer

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.

anonymous · Answer

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.