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10A = 10^2018+10/10^2018+1 = 1 + 9/10^2018 + 1
10B = 10^2017+10/10^2017+1 = 1 + 9/10^2017+1
Vì : 2^2018 <> 2^2017 => 2^2018+1 > 2^2017+1
=> 9/10^2018+1 < 9/10^2017+1
=> 10A < 10B
=> A < B
Tk mk nha
A= (2016^2016+2)/(2016^2016-1)=(2016^2016-1+3)/(2016^2016-1)=(2016^2016-1)/2016^2016-1)+(3/2016^2016-1)=1+(3/2016^2016-1) B=( 2016^2016)/(2016^2016-3)=(2016^2016-3+3)/(2016^2016-3)=(2016^2016-3)/(2016^2016-3) +(3/2016^2016-3)=1+(3/2016^2016-3) Vì 3/(2016^2016-1)<3/(2016^2016-3) Nên A<B
A=2016/2017+2017/2018
Do 2016/2017<1,2017/2018<1=> A<2 Hay A<B
ta có 2015/2016+2016/2017+2017/2015=(1-1/2016)+(1-1/2017)+(2+1/2015)
=4-(1/2016+1/2017-1/2015)
1/2016<1; 1/2017<1 nên 1/2016+1/2017<2 suy ra 1/2016+1/2017-1/2015<1(vì 1/2015<1)
4-(1/2016+1/2017-1/2015)>4-1=3
2015/2016+2016/2017+2017/2015>3
cho mik nhé
A = \(\frac{2013}{2014}+\frac{2014}{2015}>\frac{1}{2}+\frac{1}{2}=1\)
\(B=\frac{2013+2014+2015}{2014+2015+2016}<1\)
\(Vậy:A>B\)
Đúng nha Nguyễn Bình Minh
so sánh:
\(A=\frac{2013}{2014}+\frac{2014}{2015}+\frac{2015}{2016}\) và\(B=\) \(\frac{2013+2014+2015}{2014+2015+2016}\)
\(B=\frac{2013}{2014+2015+2016}+\frac{2014}{2014+2015+2016}+\frac{2015}{2014+2015+2016}\)
Ta có: \(\frac{2013}{2014}>\frac{2013}{2014+2015+2016}\)
\(\frac{2014}{2015}>\frac{2014}{2014+2015+2016}\)
\(\frac{2015}{2016}>\frac{2015}{2014+2015+2016}\)
\(\Rightarrow\frac{2013}{2014}+\frac{2014}{2015}+\frac{2015}{2016}>\frac{2013+2014+2015}{2014+2015+2016}\)
Vậy: \(A>B\)