Exercitiul 11 va rog mult.

Răspuns:
Exercitiul 11:
a) 2/2; 3/3; 4/4; 5/5. 1 = 1
b) 4/3; 6/4; 8/5; 9/7. > 1.
c) 2/5;4/7; 3/8; 5/9. < 1.
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