Question

a) Scrieti elementele multimii D₁₂ ∪ D₁₈.
b) Dati un exemplu de multime infinita.
c) Scrieti prin enumerare elementele multimii : A=(n € IΝ | 6≤n+3<21).



Cat mai repede, va rog.

Answer 1

D12={1,2,3,4,6,12}
D18={1,2,3,6,9,18}
D12 U D18={1,2,3,4,6,9,12,18}
b)M2={1,2,4,6,8,10,12,14...}
c) A={3+3=6, 3+4=7 ,3+5=8, 3+6=9, 3+7=10 ,3+8=11, 3+9=12, 3+10=13 ,3+11=14 ,13+12=15
3+13=16, 3+14=17 ,,3+15=18,, 3+16=19,, 3+17=20

Answer 2

a)D12={1,2,3,4,6,12}
D18={1,2,3,6,9,18}
D12UD18={1,2,3,4,6,9,12,18}
b)multimea infinita conține elemente infinite/care nu se termina M2={2,4,6,8,....
c)A=(n€ |N | 6< sau egal cu n + 3<21)
n+3<21
n<21-3
n<18
6<sau egal cu n < 18
n€(6,7,8,9,...,17)
Sper că te am ajutat.
Spor la lucru !