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The set of integers is not closed for (1) division (3) addition (2) multiplication (4) subtraction
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The set of integers is not closed for

(1) division (3) addition
(2) multiplication (4) subtraction

User Dilma
by
8.3k points

1 Answer

1 vote
Hello,

N is closed for an opération(µ) means that
a,b ∈ N : a µ b ∈N (i suppose so)

Answer (1) ex 2/3 ∉ N

Answer (4) ex 2-3 ∉ N

∀ a,b ∈ N: a+b ∈N is true ; not a answer.

∀ a,b ∈ N: a*b ∈N is true ; not a answer.





User Gardener
by
7.3k points
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