Question

1.Scrieti,enumerand un nr semnificativ de elemente,multimile:
a)M8(multiplul 8),M6 si M8intersectatM6.Ce observati?
b)M12,M15 si M12intersectatM15.Ce observati?
2.Precizati daca este adevarat sau fals ca:
a)15apartineD5(divizori lui 5)
b)144 apartine M9
c)1apartineD73
d)D7intersectatM7=(nu stiu cum se numeste O taiat)
e){2,4,16,15}inclusD60
f)D15intersectatM15=15
g)D4 este multime infinita
h)M4 este multime finita
i)D8intersectatD5=O taiat
j)2x3x4x...x9apartine M10
k)M3inclusM9
l)M8 inclusM6=M48.repede!!cat mai repede!!dau 99 pct si coroana!!e neaparat!!AJUTATI-MA!!VAA ROGG!!PLS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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Answer 1

a)M8={0,8,16,24,32,40,48,56,64,72,80,88,96,104.....}
M6={0,6,12,18,24,30,36,42,48,54,60,66,72,78,84,90,96,104...} M8intersectatM6={0,24,48,72,104.............}

b)M12={0,12,24,36,48,60,72,84,96,108....}
M15={0,15,30,45,60,75,90,105....}
M12intersectatM15={0,60.....}

2)a)15apartineD5    fals.
D5={1,5}

b)144 apartine M9      adevarat
M9={0,9,18,27,36,.....90,99,108,117,126,135,144...}

c)1∈D73                          adevarat

d)D7intersectatM7=Ф      fals
D7={1,7}
M7={0,7,14,....}
D7intersectatM7={7}

e){2,4,16,15}inclusD60                        fals
D60={1,2,4,6,10,12,15,20,30,60}

f)D15intersectatM15=15                         adevarat
D15={1,3,5,15}
M15={0,15,30,45,.....}
D15intersectatM15={15}

g)D4 este multime infinita          fals
D4={1,2,4}

h)M4 este multime finita      fals
M4={0,4,8,12,16......}

i)D8intersectatD5=Ф                 fals
D8={1,2,4,8}
D5={1,5}
D8intersectatD5=1

j)2x3x4x...x9apartine M10     adevarat
2x3x4x...x9=362.880

k)M3inclusM9      fals
M3={0,3,6,9,12,15,18,21,24....}
M9={0,9,18,27,36....}