Question

Answer 1

a: 199/200=1-1/200

200/201=1-1/201

mà -1/200<-1/201

nên 199/200<200/201

c: 2021/2020=1+1/2020

2020/2019=1+1/2019

mà 2020>2019

nên 2021/2020<2020/2019

d: 199/198=1+1/198

200/199=1+1/199

mà 1/198>1/199

nên 199/198>200/199

Answer 2

a) \(\dfrac{199}{200}< \dfrac{200}{201}\) 

b) \(\dfrac{2001}{2002}< \dfrac{2002}{203}\)

c) \(\dfrac{2021}{2020}< \dfrac{2020}{2019}\)

d) \(\dfrac{199}{198}>\dfrac{200}{199}\)