Raspuns:
rescriem partea care ne intereseaza(4n+ 3 de fiecare data):
a.4n+3
31- 3=28:4=7
n=7
Verificare:(4×7)+3=31
31 apartine multimii M
b. 4n+3
47-3=44:4=11
in acest caz n=11
Verificare:(4×11)+3=44+3=47
47 apartine multimii M
c.4n+3
63-3=60:4=15
n=15
Verificare:(4×15)+3=60
60 apartine multimii M
d.4n+3
75-3=72:4=18
n=18
Verificare:(4×18)+3=72+3=75
18 apartine multimii M
Sper ca te va ajuta
