Question

so sánh phân số không quy đồng mẫu: \(\frac{1234.1235-1}{1234.1235};\frac{1235.1236-1}{1235.1236}\)

Answer 1

\(\frac{1234\times1235-1}{1234\times1235}=1-\frac{1}{1234\times1235};\frac{1235\times1236-1}{1235\times1236}=1-\frac{1}{1235\times1236}=1-\frac{1}{1235\times1234+1235\times2}\)

Vì 1234*1235 < 1235*1234+1235*2 nên \(\frac{1}{1234\times1235}>\frac{1}{1235\times1234+1235\times2}\).

Do đó \(1-\frac{1}{1234\times1235}

Answer 2

\(\frac{1234\times1235-1}{1234\times1235}\&\frac{1235\times1236-1}{1235\times1236}\)

Đề vậy hả