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anonymous
 one year ago
Enter the elements of the following subsets of N:
{x; x>7 ∧ x >13}
My answear is {x; x>7 ∧ x >13} = (13, ∞)
Is that answear correct? or how should I think?
anonymous
 one year ago
Enter the elements of the following subsets of N: {x; x>7 ∧ x >13} My answear is {x; x>7 ∧ x >13} = (13, ∞) Is that answear correct? or how should I think?

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welshfella
 one year ago
Best ResponseYou've already chosen the best response.1you are right values of x between 7 and 13 are not included because of the intersect symbol.

zzr0ck3r
 one year ago
Best ResponseYou've already chosen the best response.2But you wrote an interval, and it wants the elements in N. So we would list it like, \[\{13,14,15,16,...\}\] or \[\mathbb{N}\{1,2,3,4,5,6,7,8,9,10,11,12,13\}\]

zzr0ck3r
 one year ago
Best ResponseYou've already chosen the best response.2interval notation implies continuum

zzr0ck3r
 one year ago
Best ResponseYou've already chosen the best response.2or better \(\mathbb{N}\cap (13, \infty)\) ^^^thats the one

zzr0ck3r
 one year ago
Best ResponseYou've already chosen the best response.2I was thinking it would be ok if you used an interval as long as we said our universal set was the natural numbers, but I dont think that makes sense because the natural numbers do not form a system, not even a group. Maybe just make our own notation \[\mathbb{N}\cap (13, \infty)=(13,\infty)_{\mathbb{N}}\] :)
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