a*14/3=b*7/2=c*35/6=ta=3t/14=21t/70 b=2t/7=20t/70 c=12t/70a,b,c 为正 a>b>ca,b,c为负 a
14a/3=7b/228a=21ba7b/2=35c/621b=35cb>c14a/3=35c/628a=35ca>c所以c
A*14/3=B7/2=C*35/6=x 则A=3/14x B=2/7x C=6/35xC<A<B
解:设:A*14/3=B7/2=C*35/6=1 则A=3/14 B=2/7=4/14 C=6/35 所以C<A<B