Question

Answer 1

`51/57=(3.17)/(3.19)=17/19`

`1717/1919=(101.17)/(101.19)=17/19`

`171717/191919=(10101.17)/(10101.19)=17/19`

`=>51/57=1717/1919=171717/191919`

Answer 2

Ta có

\(\dfrac{51}{57}=\dfrac{17}{19}\)

\(\dfrac{1717}{1919}=\dfrac{17}{19}\)

\(\dfrac{171717}{191919}=\dfrac{17}{19}\)

Mà

\(\dfrac{17}{19}=\dfrac{17}{19}=\dfrac{17}{19}\)

Nên

\(\dfrac{51}{57}=\dfrac{1717}{1919}=\dfrac{171717}{191919}\)