Question

[Lê Hải Ngọc]

 1:So sánh P và Q

P=2010/2012+2011/2012+2012/2013

Q=2010+2011+2012/2011+2012+2013

 2:TÍNH :    5.(2².3²)⁹.(2².3)¹⁴.3⁶ trên 5.2²⁸.3¹⁹-7.2²⁹.3¹⁸

Answer 1

[Nguyễn Phương Uyên]

\(Q=\frac{2010+2011+2012}{2011+2012+2013}\)

\(Q=\frac{2010}{2011+2012+2013}+\frac{2011}{2011+2012+2013}+\frac{2012}{2011+2012+2013}\)

Ta có :

\(\hept{\begin{cases}\frac{2010}{2011}>\frac{2010}{2011+2012+2013}\\\frac{2011}{2012}>\frac{2011}{2011+2012+2013}\\\frac{2012}{2013}>\frac{2012}{2011+2012+2013}\end{cases}}\)

\(\Rightarrow P>Q\)