Question

So sánh A và B biết :

A=\(\dfrac{2013.2014-1}{2013.2014}\) và B=\(\dfrac{2014.2015-1}{2014.2015}\)

Answer 1

Ta có : \(A\text{=}\dfrac{2013.2014-1}{2013.2014}\text{=}\dfrac{2013.2014}{2013.2014}-\dfrac{1}{2013.2014}\text{=}1-\dfrac{1}{2013.2014}\)

\(B\text{=}\dfrac{2014.2015-1}{2014.2015}\text{=}\dfrac{2014.2015}{2014.2015}-\dfrac{1}{2014.2015}\text{=}1-\dfrac{1}{2014.2015}\)

\(Ta\) có : \(\dfrac{1}{2013.2014}>\dfrac{1}{2014.2015}\)

\(\Rightarrow A< B\)

Answer 2

yuv	bhn
vgg	gvg
ggg	ggg

 

Answer 3

\(A=1-\dfrac{1}{2013.2014}\)

\(B=1-\dfrac{1}{2014.2015}\)

Ta có: \(2014.2015>2013.2014\)

\(\Rightarrow A>B\)