Question

1) so sanh cac phan so sau :

2017/2015 va 31/29

Answer 1

Ta có :

\(\frac{2017}{2015}-1=\frac{2}{2015}\)   ;   \(\frac{31}{29}-1=\frac{2}{29}\)

Vì \(\frac{2}{2015}< \frac{2}{29}\)nên  \(\frac{2017}{2015}< \frac{31}{29}\).

Answer 2

2017/2015 = 1,00099....

31/29 = 1,0689....

Vì hàng phần trăm 0 < 6 nên 2017/2015 < 31/29

Kết luận : ....

Answer 3

ta có \(\frac{2017}{2015}=1+\frac{2}{2015}\)

\(\frac{31}{29}=1+\frac{2}{29}\)

Mà \(\frac{2}{2015}< \frac{2}{29}\)

=> \(\frac{2017}{2015}< \frac{31}{29}\)