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a) 3/7; 8/9; 6/12
b) 3/5 , 5/7 ,4/9
c) 2/6,3/8,10/10
d)5/7, 3/5, 7/9
Răspuns:
a)3/7,8/9,6/12
b)3/5,5/7,4/9
d) 5/7,3/5,/7/9