bạn tham khảo cách mình xem sao :
Ta có:
1,(454) = 0,(001) . 454 + 1 = \(\frac{1}{999}.454+1\)= \(\frac{454}{999}+1=\frac{1453}{999}\)
1,4(545) = 0,0(001) . 545 + 1,4 = \(\frac{1}{9990}.545+1,4=\frac{109}{1998}+1,4=\frac{14531}{9990}\)
=> 1,(454) < 1,4(545)