Răspuns :
[tex]38)\ \ {\dfrac{84}{120}}^{(4} = {\dfrac{21}{30}}^{(3} =\dfrac{7}{10}[/tex]
[tex]48)\ \ { \dfrac{57}{63}}^{(3} = \dfrac{19}{21}[/tex]
[tex]48)\ \ { \dfrac{57}{63}}^{(3} = \dfrac{19}{21}[/tex]