a) \(2,(15) > 2,(14)\)
b) \(-0,267 (3) = -0,267333… \)
\( \Rightarrow -0,267 (3) < -0,2673\)
c) \(1,(2357) = 1 + 0,\left( {2357} \right) \)
\(\displaystyle =1+ 2357.0,\left( {0001} \right) = 1 + {{2357} \over {9999}} \)
\(\displaystyle 1,2357 = 1 + 0,2357 = 1 + {{2357} \over {10000}} \)
\( \displaystyle {{2357} \over {9999}} > {{2357} \over {10000}} \)
Vậy \(1,(2357) > 1,2357\)
d) \(0,(428571) = 428571.0,(000001) \)
\(\displaystyle = 428571.{1 \over {999999}} = {{428571} \over {999999}} = {3 \over 7}\)
Vậy \(0,(428571)=\displaystyle {3 \over 7}\)
