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![](https://rs.olm.vn/images/avt/0.png?1311)
ta có 2015 x 2017 >2017^2 -2
2016 x 2018 > 2016^2
=> A> B
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
A = 2018^2 - 2016^2
A = (2018 - 2016)(2018 + 2016)
A = 2.4034
B = 2019^2 - 2017^2
B = (2019 - 2017)(2019 + 2017)
B = 2.4036
=> A < B
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bố mày đéo bt
![](https://rs.olm.vn/images/avt/0.png?1311)
\(A=\left(2018-2016\right)\left(2018+2016\right)=2.4034\)
\(B=\left(2019-2017\right)\left(2019+2017\right)=2.4036\)
Ta thấy 4034 < 4036 nên A < B.
\(A=2018^2-2016^2=\left(2018+2016\right)\left(2018-2016\right)=4034.2\)
\(B=2019^2-2017^2=\left(2019+2017\right)\left(2019-2017\right)=4036.2\)
Vì 4036 > 4034 nên 4036 . 2 > 4034 . 2 nên B > A
![](https://rs.olm.vn/images/avt/0.png?1311)
Chưa ai giải thì thui
MK cũng bó tay
Chúc bn hok t
:) hihi
![](https://rs.olm.vn/images/avt/0.png?1311)
\(B=2016^2+2017^2-2\\ B=2016^2-1+2017^2-1\\ B=\left(2016-1\right)\left(2016+1\right)+\left(2017-1\right)\left(2017+1\right)\\ B=2015.2017+2016.2018=A\)
A=\(2016^2=2016.2016\)
B=\(2015.2017=(2015+1)(2017-1)=2016.2016\)
=> A=B = 2016.2016
\(B=2015.2017=\left(2016-1\right)\left(2016+1\right)=2016^2-1< 2016^2=A\)