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Which set is closed under the operation multiplication?

A.

{1, 2, 3}

B.

{0, 1, 2}

C.

{0, 1}

D.

{1, 2}

Question

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

readergirl12 · Answer

C.. You can get an explanation here: http://openstudy.com/study#/updates/5282ec1be4b06a94e493c1e8 And here: http://www.cut-the-knot.org/do_you_know/mul_set.shtml :D

anonymous · Answer

http://www.freemathhelp.com/order-of-operations.html try this site