so sánh :
A=1000+1001 ; B= 1000 1011
____________ _________+ _____
2019+2020 2019 2020
so sánh :
A=1000+1001 ; B= 1000 1011
____________ _________+ _____
2019+2020 2019 2020
Đáp án:
Giải thích các bước giải:
A= 1000+1001 / 2019+2020
= 1000/ 2019+2020 + 1001/ 2019+2020
Ta có: 1000/2019+2020 < 1000/2019
1001/ 2019+2020 < 1001/ 2020
=> 1000/ 2019+2020 + 1001/ 2019+2020 < 1000/2019 + 1001/2020
hay A<B
Tick cho mình nhaaaaa.