Incercuieste litera corespunzatoare sirului care cuprinde fractii ordonate descrescator
a) 2/6,1/6,4/6,3/6,5/6,6/6
b) 8/8,6/8,5/8,3/8,2/8,1/8
c) 9/9,8/9,6/9,7/9,5/9,2/9