Răspuns:
1. {1,2,3,4,5,6,7,8}
-reunim ambele mulțimi
2. {3,6}
-luăm elementele comune
3. {1,4,7}
-ce are prima multime si nu are a doua
4. {2,5,8}
-ce are prima multime si nu are a doua
PART II
1. D. (a=5 ,b=3)
2. A.{3,4,5}
3. C.7
4. B.12
PART III
1. A={2,5,1,3,8}
B={2,5,0,4,6,7}
2.
a) 5< x <9
A={5,6,7,8}=4 elemente
y=5-3,6-3,7-3,8-3=2,3,4,5
B={2,3,4,5}=4 elemente
2xY-1=2x2-1,2x3-1,2x4-1,2x5-1=3,5,7,9
C={3,5,7,9}=4 elemente
b) i)A ,ii)F iii)A iiii)F
3.Card.A<Card.B
