Question

12€{n|n€N,n+1<sau=16}
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Answer 1

Răspuns:

n=0=>0+1=1<sau=16 (A)

n=1=>1+1=2<sau=16 (A)

n=2=>2+1=3<sau=16 (A)

n=3=>3+1=4<sau=16 (A)

.....

n=15=>15+1=15<sau=16 (A)

n=16=>16+1=17<sau=16 (F)

12€{0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}

Answer 2

{0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}

=> 12€{0,1,...,15}