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Kitten_is_back
 one year ago
Which sets of numbers are closed under subtraction?
Choose all answers that are correct.
A.
odd natural numbers
B.
rational numbers
C.
{0, 1}
D.
{0, 1, 2}
Kitten_is_back
 one year ago
Which sets of numbers are closed under subtraction? Choose all answers that are correct. A. odd natural numbers B. rational numbers C. {0, 1} D. {0, 1, 2}

This Question is Closed

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Hm... I've never heard it called "closed" under subtraction.

bahrom7893
 one year ago
Best ResponseYou've already chosen the best response.1Basically this is saying, which set can you manipulate in a way that it maintains its elements. There's an example here: http://www.algebraden.com/closure_property_subtraction_of_integers.htm

bahrom7893
 one year ago
Best ResponseYou've already chosen the best response.1Let's take C for example: {0, 1} 1  0 = 1 which is in the set, but 01 = 1 which is not. So this set is NOT closed under subtraction.

bahrom7893
 one year ago
Best ResponseYou've already chosen the best response.1or D: {0, 1, 2} again 12 = 1, not in the set, so not closed under subtraction

bahrom7893
 one year ago
Best ResponseYou've already chosen the best response.1What about A? What are odd natural numbers?

bahrom7893
 one year ago
Best ResponseYou've already chosen the best response.1Well, what are odd natural numbers?

Kitten_is_back
 one year ago
Best ResponseYou've already chosen the best response.0idk and night '='

bahrom7893
 one year ago
Best ResponseYou've already chosen the best response.1odd natural numbers are odd positive integers: 1, 3, 5, etc. so 13 = 2 which is NOT an odd positive integer which is why this set is NOT closed under subtraction
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