va rooog ex 8 dau coroana

60/84=30/42=15/21=5/7
64/80=32/40=16/20=8/10=4/5
120/192=60/96=30/48=15/24=5/8
108/180=54/90=27/45=9/15=3/5

a)[tex] \frac{60}{84} ^{12} = \frac{5}{7} [/tex]
b)[tex] \frac{64}{80} ^{8} = \frac{8}{10} ^{2} = \frac{4}{5} [/tex]
c)[tex] \frac{120}{192} ^{12} = \frac{10}{16} ^{2}= \frac{5}{8} [/tex]
d)[tex] \frac{108}{180} ^{9} = \frac{12}{20} ^{4}= \frac{3}{5} [/tex]