So sánh : 2020×2021/2020×2021+1 và 2021×2022/2021×2022+1

2 câu trả lời

Đáp án: đây nha bạn

Ta có:

2020+2021/2021+2022=2020/2021+2022 + 2021/2021+2022

mà 2020/2021>2020/2021+2022

2021/2022>2021/2021+2022

=> 2020/2021+2021/2022>2020/2021+2022 + 2021/2021+2022

=> 2020/2021+2021/2022>2020+2021/2021+2022

=> A>B

Vậy nên A>B.

 

Giải thích các bước giải:

 

Ta có:

2020+2021/2021+2022

=2020/2021+2022 + 2021/2021+2022

mà 2020/2021>2020/2021+2022

       2021/2022>2021/2021+2022

=> 2020/2021+2021/2022>2020/2021+2022 + 2021/2021+2022

=> 2020/2021+2021/2022>2020+2021/2021+2022

=> A>B

Vậy nên A>B.

$\text{xin hay nhất}$

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