SOLUTION: Which of the following sets of numbers is closed under multiplication? {-2,-1,0,1} {-1,0,1,2} {0,1,2} [0,1}

Algebra ->  Real-numbers -> SOLUTION: Which of the following sets of numbers is closed under multiplication? {-2,-1,0,1} {-1,0,1,2} {0,1,2} [0,1}      Log On


   

Question 825234: Which of the following sets of numbers is closed under multiplication?
{-2,-1,0,1}
{-1,0,1,2}
{0,1,2}
[0,1}
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Which of the following sets of numbers is closed under multiplication?
{-2,-1,0,1}:: no because -2*-1 = 2 is not in the set
------------------------
{-1,0,1,2}:: no because -1*2 = -2 is not in the set
------------------------
{0,1,2}:: yes
--------------
[0,1}:: yes
================
Cheers,
Stan H.
================