va rogg............am atașat poza
pag 18.

Explicație pas cu pas:
11.a)MUN={1,2,3,4,5,6}
b)M\N={2,3}
M={2,3,1sau4sau5sau6}
N={1,4,5,6}
c)M_are 3 elemente
12.a)MUN={2,4,6,8}
b)8apartine N\M
c)M n N={2,4}
d)M\N={6}
M={2,4,6}
N={2,4,8}