15-11-2017
Mathematics

contestada

Are positive integers closed under subtraction?
•yes
•no

Are rational numbers closed under multiplication?
•yes
•no

Are negative real numbers closed under division?
•yes
•no

Are irrational numbers closed under addition?
•yes
•no

Respuesta :

PandaBear002 PandaBear002

20-11-2017

Do you remember the answer..? I need help as well.

Answer Link

johnrossmathews johnrossmathews

27-11-2017

#1 not closed
#2 closed
#3 not closed
#4 not closed

Answer Link

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