SOLUTION: Explai whether the set {2, 4, 6, 8, 10, 12, ...} is closed with respect to addition on whole numbers?

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Question 387816: Explai whether the set {2, 4, 6, 8, 10, 12, ...} is closed with respect to addition on whole numbers?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Closed because the sum of to positive even numbers
is a positive even number.
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Cheers,
Stan H.