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Fie: A={x|x€ N*, x <9}, B={x|x€ N,x} - numar natural de o cifra} C={x|x€ N, ≤ x < 4 }. Aflati
a) AUB;
e)AnC
b) AUC
f)BnC
c)BUC
g)AnBnC
d) AnB
h) CU(AnB).

Răspuns :

Dandaniel646
A=1,2,3,4,5,6,7,8
B=0,1,2,3,4,5,6,7,8,9
C=1.2.3
AUB=0.1.2.3.4.5.6.7.8.9
AnC=1.2.3
AUC=1.2.3.4.5.6.7.8
BnC=1.2.3
BUC=B
AnBnC=1.2.3
AnB=B
CU(AnB)=B

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