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Earn +20 ptsQ: Are whole numbers closed under the operations of addition?
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Is this set of negative numbers closed under multiplication or addition?
Yes. The empty set is closed under the two operations.
When are complex numbers closed under addition?
Quite simply, they are closed under addition. No "when".
Is a rational number closed under addition?
No. A number cannot be closed under addition: only a set can be closed. The set of rational numbers is closed under addition.
Are rational numbers closed under division multiplication addition or subtraction?
Rational numbers are closed under addition, subtraction, multiplication. They are not closed under division, since you can't divide by zero. However, rational numbers excluding the zero are closed under division.
Are whole numbers closed under the operations of multiplication?
Yes.
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