Question

A={x|x=2n,nEN,n <4};
B={y|yEN*,y=x-2,xEA};
C={z|zEN,z=y2,yEB}.
Calculați: (AuB)nC si (B\A)uC


Heeeeeeeeelp

Answer 1

A=nEN={0,1,2,3}
x=0
x=2
x=4
x=6

B=Y=0-2NU SE POATE
y=2-2=0
y=4-2=2
y=6-2=4

C=Z=02NU
z=22
z=42

AuB={0,1,2,3,4}
AuBuC={0,1,2,3,4,22,42}

B/A=4
B/AuC={4,22,42}