Răspuns:
8.
a) A={ 1,2,3,4}
b) B={4,3,2}
c) C={ multimea nulă}
d) D={c,o,r,d,u,ș}
10.
A={4,3,2,1,0}
B={9,7,5,3,1}
C={16,8,4,2,1}
